Personally speaking; I think it's a sin if an entire community engages in it - for the community cannot reproduce. For a small minority within in it, I doubt it should be a sin. I'd like to back it up with some evidence, but I haven't enough Islamic scholarship for that, yet.
However, Irshad Manji has. She calls herself a Muslim Refusenik, and is openly lesbian. You may find her interesting reading.
You may think that she has been too obviously westernized, she is after a Canadian; but The Prophet said, in a mashhur Hadith "Seek Knowledge, even in China". (Personally, I haven't read her work).
Further, I'd like to point out all sorts of 'deviant' sexual behavior - including homosexuality in Nature have been found by zoologists. Islam gives only free will to humans. Only for us, is there a category of Halal & Haram. It's interesting that He allows that behaviour as accordance to their native temperament; but not for us (apparently).
I haven't read the Qur'an. (I've read it in Arabic twice, but did not understand it, the blessing of a rural Bangladeshi madaressa imported to England). I will do eventually. It would be useful to me if you could highlight which verses you have read that 'caused you depression', and whose translation you have read.
Further, minorities generally have to work to have their voice established as elites are usually take charge of interpretation of important texts & the law. They are fallible; as they are only human. Sometimes, they look at text & see only their own prejudices staring back at them. One has to work at finding the best, as they often become lost in the clamour of voices claiming our attention.
Finally, many profound texts abound in contradictions; that should not be an index of their failure. The Uncreated Speech of Allah must be profound; as He only truly is.
"(He is) the Creator of the heavens and the earth: He has made for you pairs
from among yourselves, and pairs among cattle: by this means does He multiply
you: there is nothing whatever like unto Him, and He is the One that hears and
sees (all things)."
42.Ash-Shura, Aya 11:translator, Yusuf Ali
Allah makes 'pairs' amongst us, and in nature. Nothing here says they must be between 'male & female'. However He goes on to say that He 'multiplies'. This may be taken to mean that only heterosexual relationships are lawful. But, in fact, I do not think this is the main thrust of the aya. It is only an example to show that 'Nothing is whatever like unto Him'. That only He is the Creator.
It's easy to see that this verse could be misinterpreted (either deliberately or unconsciously) to make out only heterosexual relationships are lawful, for they multiply.
To emphasis that this verse is entirely about Allah's creative powers, I'd like to point out that He made the 'Heavens & the Earth', that is Space & Matter, another 'pair' with which He created our physical universe.
There is a specific verse in the Qur'an that seems to deal directly with homosexuality, to wit:
"We also (sent) Lut: He said to his people: "Do ye commit lewdness such as no
people in creation (ever) committed before you? (80) For ye practice your
lusts on men in preference to women: ye are indeed a people transgressing
7.Ash-Shura, Aya 80-81:translator, Yusuf Ali
This, may look as though then Homosexuality is banned. But looking at the whole verse, I do not think that this is true. Yusuf Ali commentates towards the end of this verse:
"Our attention having been directed to various prophets, who were sent with
missions to their several peoples, ... We contemplate no longer, after this,
partial truths. It is not now a question of saving Israel from the bondage of
Egypt, nor teaching Midian the ethics of business, nor reclaiming the people of
Lut from sexual sin or Thamūd from the sin of oppression in power, or ‘Ād from
arrogance and ancestor-worship. Now are set forth plainly the issues of Life
and Death, the Message of God, the One Universal God to all mankind."
Al-A'Raf, translation by Yusuf Ali, note 1110
That these are particular & partial truths to illustrate the temptation of evils. One needs to contemplate ethics from a whole point of view. Though Al-Yusuf talks of 'sexual sin', the general truth is to sink into only the world of sense, to deaden reason, and only allow our sensual appetites to rule us entirely.
Merely inheriting a Book, or doing lip service to it, does not make a nation
righteous. If they succumb to the temptations of the world, their hypocrisy
becomes all the more glaring.
Sura 7:Al-A'Raf, Aya 169, translation by Yusuf Ali, note 1121
Is a warning not to rely simply on interpretations & fatwas, but to do the hard work of understanding yourself. This is reinforced in
'The latent faculties in man are enough to teach him the distinction between
good and evil, to warn him of the dangers that beset his life. But to awaken
and stimulate them, a personal appeal is made to each individual through the
"still small voice" within him. This, in its uncorrupted state, acknowledges
the truth and, as it were, swears its Covenant with God'.
Sura 7:Al-A'Raf, Aya 173, translation by Yusuf Ali, note 1127
I suggest that the 'still small voice' is within in you and 'acknowledges the truth'. You know your own being, that has been granted to you by Allah; don't bury it. That you are depressed by the verse, shows only that you yourself haven't understood the full meaning of the verse, having been pointed towards particulars, and not generalities; and not towards Allah and the reality of his Goodness.