<human>: So a friend of a friend (22f) stayed over for a couple weeks a few months back. Another friend constantly talked to her and said how he was in love with her, but when she arrived he ended up hanging out and sleeping with a girl next door the entire time she was here. Once the 22f left my friend started dating the girl next door and rarely talked to her. While this happened 22f and I started talking a lot and her best friend said that she might like me. Well now my friend has broken up with the girl next door and has once again started pursuing 22f while screwing a different girl each week and telling me he thinks he is in love with each of them. (She is also quite comfortable with him and I just don't know) I really like this girl, and I just don't know if I should just turn away now to avoid anymore hurt and a broken friendship or continue and just hope she actually likes me. 

-Thank you Reddit

Can you condense the text into a few key points?
<bot>: Girl stayed over for a couple weeks, friend said he loved her, then abandoned her. I like her a lot and now he likes her again.