Sharing Our Innermost Thoughts

I need the opinion of queer women (or anyone else at this point). How do you deal with being in a relationship and having other queer friends? I’ve been in my long distance relationship for 3 years and met my first real friend since covid a few months ago (who happens to be a gay woman). My gf seemed to be happy for me as the three of us later hung out. She now tells me she’s uncomfortable with me having sleepovers with her and acts very coldly to me whenever my friend and I hang out. I feel like she hates me but i’m trying so hard to be a good gf.