Guys/girls what to do about guy?

OKay this is kind of strange and has been going on for a lil over 3 years now. There is this boy that i met well call him Tyler. When i met tyler i really started to like him we were doin this bball thing together. I liked him a lot more then anyone ever before. But we dont go to the same school and i didnt see him anymore after about 2 months. Then i liked a couple other boys it had been like 5 months since id seen him. Then i saw him at a restaraunt and we talked and i started to like him again. Alot. but then it had been like a month and i didnt see him again for about 4months and i liked some other ppl. Then i ended up doin that basketball thing again and tyler was there again. I started to like him again alot 2 months ped and then we didnt see each other anymore. he is one year older then me btw. our moms did this work out thing at OAK orthopedics together so i never saw him but i heard about him every once in a while. but i liked different boys at the time. then he transferred schools bc he wanted to do something else i dont know details exactly but his mom dusnt go to OAK anymore. So i havnt seen him in about a year then yesterday i ran into him at the grocery store and now i like him again. so i have liked him on and off for like 3years why is it that i never really get over him? its not that i just stop liking him its that i just dont see him so i start to like someone else. And everytime i do like him i like him more then i have ever liked anybody else, why is this? any input is welcome. thanks