@Alex A said " if you don't want to be married in next life, it is also fine, and this is your choice to do. And in Heaven you can do whatever you wish, you can get married there, or anything."
I disagree with you because of a hadith "It was narrated that Abu Hurayrah said: Abu’l-Qaasim (blessings and peace of Allah be upon him) said: “and there will be no one in Paradise who is unmarried.” Narrated by Muslim (2834)."
So everyone have to get married in Jannah. You are thinking with mindset of this world that you don't want to married, In Jannah people will be different. When you enter Jannah you will wanted to get married because how attractive men and women will look and their good character.
“(there will be) therein all that the ones inner-selves could desire, all that the eyes could delight in, and you will abide therein forever”
“Therein you shall have (all) that your inner-selves desire, and therein you shall have (all) for which you ask for”
As above words from Quran says your desires will be satisfied, one of the desire will be to have a partner.
Why wouldn't you want to get married in this world? when Allah ordered us.
And if you fear that you will not deal justly with the orphan girls, then marry those that please you of [other] women, two or three or four. But if you fear that you will not be just, then [marry only] one or those your right hand possesses. That is more suitable that you may not incline [to injustice].
Surah An-Nisa 4:3
And of His signs is that He created for you from yourselves mates that you may find tranquillity in them; and He placed between you affection and mercy. Indeed in that are signs for a people who give thought. [Ar-Rum:21]
And Allah Knows best.