At the age of 16 I had this one friend in which we both didn't really think about our religion. One night we were at her house and we ordered food from a place that wasn't halal and I'm not saying it was her fault because I was fully aware of my actions and I knew it was haram yet I still did it but I sorta felt as if it was peer pressure from both of us. A year has passed now and I've basically lost contact with her but I've been giving that day a thought and I've never ate unhalal meat again but I regret that day so much and wonder if I'm gonna be punished for it even though I wasn't that aware of the punishments of doing haram things. Also I wanna know if there is a way that I could ask for forgiveness about that specific reason. Any sort of help is accepted thank you!
The answer to "Is it possible to be forgiven for [blah] by Allah?" is going to be "Yes." See Does Allah forgive every sin?
He who seeks repentance (from the Lord) before the rising of the sun from the west (before the Day of Resurrection), Allah turns to him with Mercy.
Sahih Muslim 2703
But the decision is up to Allah:
Indeed, Allah does not forgive association with Him, but He forgives what is less than that for whom He wills. And he who associates others with Allah has certainly fabricated a tremendous sin.
Two of Allah's names are The Repeatedly Forgiving and The Much-Forgiving, so we can expect that He will forgive generously. To this end, the process of repentance is described here: How does one repent in Islam?