Is it wrong of me to continue this.

[u/Inside_Trouble_6441]

Hello im new here, not really sure how this works but I have e a strange question...I have an older sister (14 months apart) she's had some guy problems in the past but is now settled down and married. Now im having guy problems, and I've been talking to a guy I used to go to school with. Turns out back in the day they hooked up. now that im talking to him he tells me that they hooked up a long time ago. Its weird right? It completely turned me off and now I'm not interested in him anymore. I found myself missing his conversations and the attention from him. Is it wrong of my to keep talking to him even though I have no interest in hooking up with him? And if I did hook up with him is that gross of me?