<human>: Can you provide a brief overview of the text?

Basically, girlfriend kissed a stranger while away, and then betrayed me again after I took her back. I broke it off, but not in a rude way. Even though what she did was unforgivable, she did confess to these things herself, and she's been the girl I loved for 2 years

I told her that we were young only 19, and I don't think she was a bad person, just young and not ready for a relationship. She was sad, but seemed to accept it.

however, she's been contacting me a lot. Tellin me she misses me, she loves me, and she'll do anything to make up for what she's done. She dropped off a cute inside joke gift that made my heart ache. Each time I've told her no, but it's getting harder each time, and I feel like I can never get over her like this. I feel guilty for being cold to her, even though she was the one who made the decision to cheat. What do I do to stop feelin like this?
<bot>: girlfriend cheated on me, then lied again. I broke up with her, but she's been begging and making me waver. How do i get over her and stop feeling guilty of being cold to her?