Trying to get in contact with a guy i met on vacation but not sure what to do?

Ok so I'll try to keep this as short as possible. I met him Tuesday at a resort, and he approached me. We hung out for a bit (we were at the pool/beach and my parents were at tennis) and we got back to my chair and my mom was there so I basically told him that my mom was there and I was gonna go chill with her. Us hanging out for a bit was kind of awkward for me so I was ready to be done with it haha.

I ended up seeing him at the pool Thursday but never said hi to him because I didn't feel like hanging out with him again. But then Friday came and I felt sad because I knew he was leaving on that day. Ever since then I've kind of missed him and I feel like the way I ended our time made me seem like a jerk to say the least.

Due to some key info he gave me, I was able to track down his dad on facebook. However, even though the father lists family relationships, I couldn't find his son. I'm pretty certain that if he had a FB account I would have found it yesterday, so the only way I can try and contact him is through his dad.

(Btw, if anyone is wondering why I waited so long it's because I just got back yesterday)

So I really don't want to have to contact his dad. I'm really nervous that with the way I ended our time he might have complained (don't feel like that is the right word) to his parents even though I know he was interested in me? What do I do? Do I give the dad my number to give to him or ask for his son's number? Do I apologize too? Any help would be appreciated!