<human>: Can you give me the gist of the text in a nutshell?

My girlfriend and I have two close friends who are also in a relationship with one another. Naturally we are closer to the person of the same sex, but before we all collectively became friends I was pretty close with the other girl; in fact when my GF and I broke up on a two different occasions the other girl "helped" me through it. I say "helped" because she mainly just lent me a listening ear.

 Anyway when my GF and I got back together most recently (last September) she was very upset with how close I was with this girl while we were apart. I told her not to be blah, blah, blah. Eventually, we worked through it and I am no longer as close with the other girl, but deep down inside I know she has, or had, feelings for me at some point in our friendship even though I would 1) never want to be with anyone other than my current GF and 2) never consider her as a potential partner because I am not attracted to her and think she is a bad GF to her current BF whom I'm friends with.

I am worried that as the four of us get older and mature more, the other girl is going to say or do something that could be detrimental to my relationship with my GF and my GF's friendship with her. Is there anything I can do?
<bot>: GF and I broke up, I got closer with another girl who is dating my friend, GF and I get back together and she is uncomfortable with that, GF gets over the jealousy but I still feel uneasy about what could happen.