Questions: Family & Friends

I am 15 M and my older brother is 18 M, We grew up very close and he has always been there for me and looked after me since our parents were always working and were barely home. Even when we got older, we were still very close.. however we still shared the same bedroom and bed. I thought it was normal since he would offer to sleep in the same bed as me whenever i got scared when i was a child.. but now that im 15, i do feel a bit uncomfortable sharing a bed and room with my older brother. But that’s not the only problem, he’s always been very overprotective of me and whenever i mentioned that im going to hang out with my friends he gets angry and asks a lot of questions such as “who im hanging out with” or “is it a boy or girl”. He always likes to be very affectionate and calls me “darling” or “baby boy”…and whenever we’re apart such as (school, soccer practice, etc..), he texts me saying how “he misses me” and that “he can’t stand being apart from me”. I honestly don’t know if i should talk to him or tell my parents.. I don’t know what’s going or if i’m overthinking things