<human>: Can you condense the text into a few key points?

Me and my BF have been together for 2 1/2 years now and have a child together. When we first got together we were both struggling  with drug addictions and cut off all of our friends because of it. We're over a year sober now.

I have always been close to my family, so I didn't struggle too much with cutting my friends off, but my BF did. Just recently he started making new friends, and IMO they are pretty cool.

But I'm an introvert and going to school full time with a kid, I just have no interest in making new friends at the moment. My little brother (18M) has always been a best friend to me, so I'll just hang with him, maybe go see a movie or play video games. When I need girl time, I hang out with my mom. 

Lately my BF has been pressuring me to hang out with him and his friends, and I just have no interest in it. They are all athletic, and I'm not, and we just don't have much in common. I don't mind the occasional "hi how ya doing" but I just don't have any desire to be around them for long periods of time. I have no problem with my BF hanging out with them and doing things with them, but he's been getting more bothered lately that I don't ever want to go out with them. 

Should I suck it up and hang with them? Or do I stand my ground and tell my BF I'm just not interested, but have no problem with him spending time with them?
<bot>: BF has made new friends that I like but have no interest in spending a lot of time with. Should I just hang out with them or tell him I don't want to?