Is this weird

i’m in 5th year in school(17) and my bsf brother is in 3rd year(15) and i’m close with her whole family and practically live there, so if she’s not home i go and sit with him, some nights me and him end up cuddling in his bed, obvs nothing else but i don’t know how to feel about it, i do like it but don’t know if i like him, i feel weird about the age though

i don’t sleep in his room i’m only there if my friend isn’t and everytime he’s initiated the cuddling