Hope you're not overthinking this and giving yourself (and your partner) enough mental space without limiting each other's individual liberties.
Is there something that has happened in the past that makes you think this way? Or a certain trait of him that has made you think of him in this light.
Being in a relationship is tough. It get's even more complicated when you're in a same sex relationship (I think, as I am in one).
I can somewhat relate to this situation and I'm on the other side of this scenario where I like to be alone at times and love to go out and party and meet new people. Overtime, I have realised this is an unexplored side of me that I am longing to discover.
So although I have a partner, I want to be able to explore and experiment my newly discovered being.
I came out in 2015 and there is so much to experiment and so much to see and do. I love my partner, but I don't want to limit my youth of all the experiences either.
Nevertheless, I have voiced my discomfort and wild attitude towards everything and my partner acknowledges this side of me and understands it. In most instances, communication is literally the key. You'll get a thousand words from your man and you'll know in an instance where his head space is at in one emotion, when you have an open, honest conversation about your discomfort.
Good luck :)