I don't know whether I should ask him out?

I know this isn't the best place to post this question but I've got no where else to so here it goes........basically I like this guy....a lot.It started out when at rehearsals for our school production he started flirting with me but at the time I had a bf and he had a gf(I didn't know at the time).I was planning to break up with my bf before all this so I did that day and the boy I like added me on FB and spoke to me for hours which was still the same day.My friend told him I liked him cause I had since I started secondary school in September and he told me that was cute and stuff.Ever since that day we would talk every day on FB for hours,it still goes on now.He sends lots of X's and O's and we FaceTime a lot,usually for at least 2-3 hours a day.During the week we performed our production and whenever we had rehearsals at the theatre we would have to be in our dressing rooms when we weren't on stage or when it was the breaks and he would 24/7 be in my dressing room I shared with my friends.He found out I was ticklish and he would constantly tickle me and sometimes put his hands up my shirt slightly to tickle me more and he kept winking at me.During most of this he had his gf but one day at rehearsals I broke down in my dressing room cause I like him so much and he was screwing me around.Because of this and because she wasn't a proper gf(he'd only known her 3 days when they got together & the live really far away & never see each other) he broke up with her.So some of it he was single so I felt better.He kept giving me hugs and everyone kept saying to us that we would make a cute couple and we'd both always blush and stuff.I like him so much but also he's a year older(he's in year eight) and he's had a lot of girlfriends.He's admitted he likes me but if he does why hasn't he asked me out? I'm sorry I'm really confused and I really need advice,thank you xxx