guy friend advice in a Biblical perspective

hey guys. so this may or may not be really long but either way i am going to spill my heart out into this post.

so two years ago, one of my good friends was dating this guy. i added him on snap and we started talking. they broke up. i told him i liked him and he liked me back. but he used to smoke.. i don’t know if he still does.. i’m too scared to ask because i care about him and i know i can’t stop anything. there is a bit of an age difference. my parents do not like him. i don’t come from a Godly home but i am the only one who goes to church and i gave my life to Him. i’m a Christian. this guy isn’t. in fact, i left my school in october. we weren’t together then but i’ve been on and off with this guy. we loved each other. this guy has a girlfriend. she’s evil. she acts high around him. she acts so different when she’s around him. he doesn’t believe it though. should i tell this guy i like him or no? i just want another try after we give it some time. is it wrong to tell him this while he’s dating someone else? i’m 13 (about to be 14 in April) and he’s 16. we were 12 and 14 when we met and fell in love. please no hate for the age. so much stuff happened that i should tell but i just can’t. not on here.