GUYS I REALLY NEED YOUR HELP/OPINION?

[LMAO]

Ok, so I was at a dance and this was like a while ago
but like i went to a dance and my friend said that i should go talk to R (lets call him that)
but then another girl came and said that I needed to talk to S and it was urgent, so i went to go see S. I have never met R in person, though we have talked on facebook lol and I S ended up asking me to prom. this was quite a while ago but I am not going out with him anymore. The thing is I am really curious why R wanted to talk to me. Should I ask him and be like, "hey I remember at a dance my friends said I should talk to you? what's up? " i really want to know, the thing is that it was a while ago but I still want to be friends with him.
i already went to prom with S by the way and we separated afterr