can you make friends with your bf/husband's friends?

That would be nice, one of my friends is in a serious relationship right now and me and his grilfriend don't seem to be getting along as well as we could, she seems to think that we spend to much time together and I am afraid that if they eventualy get married or soemthing I may never see him again or only seem seasonaly or something.

Yes, I can make friends with them and two of them are already in my MSN list.