Lonely but not? I want friends but enjoy not having friends? Not sure what i want...(Vent?)

I'm not sure how I should start this or anything and my GCSEs for English weren't great so it might go from thought to thought and get confusing, I Apologise

I'm in a committed gay relationship (6+ Yrs) and I'm still madly in love with him so I don't think its anything to do with not being happy in my relationship.

The problem I guess I've been having is that I'd love to be able to go out with mates, do activities and talk about stuff that I wouldn't necessarily would with my OH or opinions he don't share such as Hobbies, Music, and other general stuff. It's not that I cant talk about these things with him but if there's something he's not interested in talking about or doing then I feel stuck because there's no one else. But at the same time I've had a few close friends in the past and then fell out with them because of other reasons, and I feel like I don't have the time or energy to have friends because I would rather invest that into my relationship if that makes sense...

I'm not sure what to do, where to meet new people and I also feel like trying to find/meet friends comes off a bit wrong and worried my OH might think I'm trying to talk/flirt with other guys etc...