there’s this guy...

hello again

I don’t want to make this long lol

There’s this goood lookin guy that We used to have a crush on each other in high school but age was the problem. Now he’s 20 and I’m 22. Apparently he wants to get with me but I feel weird because he’s very close friends with my younger sister and I feel like if anything happens, he’ll tell her. Should I just forget the guy and stay friends?