<human>: So my girlfriend and I of 3+ years broke up recently and I'm not sure how I feel. I do agree that we weren't right for each other at the time and we are trying to stay friends. 

However recently she has been hanging out with a male friend a lot going on trips and whatnot. She says there's nothing romantic about it. It's a temporary platonic(?) rebound to get over our relationship. 

I know for a fact that he doesn't share that same feeling. He likes her and wants more and I want to punch him in the face. 

I guess what I'm asking is what's the morality behind temporary rebounds? I know I went through some kind of crisis after the breakup and had two hookups and both times in the middle of it I just felt like such a terrible human being and I didn't want to continue further. Finished them off and I just rolled over and went to bed. Told myself I shouldn't be doing this kind of crap hurting other people.

Condense the text into a few key points
<bot>: is it wrong to use/date someone without any romantic intents? It feels underhanded if everything isn't out in the open and I'm not sure she disclosed that.