<human>: Can you summarize the given text in a few sentences?

Before I start I'm not writing this like an English paper its 3am and I have more important things to worry about 

Now I have been going out with this girl for a little over a month now and in the beginning it was nice. We had good conversations, we both were physically and mentally attracted to each other, but the last week I began to notice something that started to bug me. She is the ex of one of my friends and they had a relatively bad ending to their relationship, but anyways I noticed that when we're around him she is much more flirty and affectionate than usual this didn't bug me until I realized that the same day she started flirting with me was the same day that my friend had gone public with his new relationship. So a couple thoughts going through my head are a) she's not over him and b) she is using me a "fuck you" to my friend. I have spoken to her best friend who I trust and she has noticed the same thing. This is not the only problem I have found with this after the first week of our relationship I found that when we talk over the phone or in person our conversations would go in circles around what we're or have done and would just bore me as much as I hope they bore her. I simply took this as a sign of the mental attraction evaporating
<bot>: I think my girlfriend is using me as retaliation on her ex who she is not over, all while I am losing all mental attraction to her