Should we stay friends?

This past weekend I spent my birthday with a long time college friend. We had a great time but the last night was a little off. I had put on a cute black fitted dress for the club. She was a little surprised and came and said let me take a picture of you. I posed and then she Immediately started texting. I asked her who she was texting and she said it was no big deal. I said yes because if it was the other way around you would want me to tell you. She laughed because she knew it was true. She keep being around the bush and I asked her was it these 2 other girls we went to school with. She said who else would I be texting this to. The two girls she was texting, I am no longer friends with. We never had any problem we just naturally grew apart, She stayed friends with them because they just clicked better.

After a while of us going back and forth, I let it go but I was still mad because she was being indirect. A little later she came back and said that it was them who she texted my picture too. I said thank you for telling me.

I’m still thinking about the whole situation and how she didn’t asked to send a picture of me to someone else and how she didn’t let me know what the text message was about.

We have been friends for 7 years and my only friend I have from college. We have been on plenty of trips and had some great memories. It’s just sometimes I think i give more into the friendship like I compliment her more and I make sure her pictures are nice whereas with me it’s not quite like that. She’s never done nothing vicious like lie, steal

Or spread any rumors as far as I know. I don’t know if she is being intentional or if it’s just her personality.

Am I over thinking about this situation. Would it be good to stay friends with her. She wants me to go on another trip with her next month, but idk. Any advice will help!