Is this normal? boy trouble?

ok so this year one of my friends liked me. he is truly one of the nicest guys ever. i tried not to lead him on but it didnt work. so on valentines day durin school he came up to me, told me he liked me, said the sweetest stuff, and gave me a bear as well as chocolates. at the moment i told him i only saw him as a friend (bcuz i saw him as nothin more than that). that didnt stop us from stayin close friends tho. so months ped. and now he recently started datin someone. i kinda know her, i wudnt say we are close friends tho. so today we went to the movies as a group of friends and he brought her of course. i am happy for him but idk... i miss him. i dont wana sound selfish bcuz im not but i just feel like i ruined my chance wit him (which is true) and i completely regret it. also another thing is we still text and today he told me how much he missed me and he was glad to see me and he said i was beautiful, caring, smart, and the most random person he knows. it gave me the feelin that he still has feelings for me. shud i keep tryin? i dont wana interfer wit him and his girlfriend but do i still have a chance? wats the reason for my sudden feelings for him? oh and im not jealous so please dont think that. anyways.. advice???