I don't have a group of friends

So in school I kinda float between 2 or 3 different groups, or else I just sit and talk with 1 or 2 of my close 'school friends'.

Outside school, I have a small handful of people I would consider close friends, maybe like 4/5, and these include my close school friends. I NEVER get to hang out with them, they're always with their own friend group or just don't bother hanging out. In my mma gym I got some friends but I don't see them outside training or if we go somewhere as a team.

I guess I wanna be a part of a group and regularly hang out with them rather than occasionally hanging out with a different group of friends. I wanna have a group of my own rather than be a drop in. You get the idea.

As far as girls go I'm good with girls, I got 3 that I fuck regularly and sometimes hang out with. My only problem is I don't have a male friend group. What can I do? Any help here is great, thanks.