Yesterday I went to my girlfriend's (now my ex?) room to do some homework with her. After a while she asks me to lie down with her so I do and I start making my way towards sex. After a few minutes of refusal I put her clothes back on her and mine also then asked her what was wrong (I could see it in her eyes and hear it in her voice).

She kept saying nothing was wrong but because I knew something was wrong and she didn't want to tell me what it was. I got out of bed and sat down on my computer and started working then after a while she took off her pants then got out of the bed to grab me by the arm and lead me into the bed.

While we had sex she was tearing up and almost crying then when we finished I asked her what was wrong and she told me that the problem was that she loved me. She said that we should break up because she feel like she's forcing me to stay in a relationship that I don't want to. She wants me to be free but still spend nights with her. (She's telling me I can go see other girls as long as I'm seeing her too?)

If this came from any other girl I'd be okay with it, but for this girl I was her first boyfriend, I took her virgnity and I taught her everything she knows about sex so I understand her attachment to me. She's a good girl (for now) and I just don't want to be the person who messes her up if I just start using her for only sex.

Even though this is the goal of plate spinning, it feels like she wants to be around me due to desperation and I feel like I'm manipulating that if I still agree to have sex with her. What's the best plan of action?