I Think......

Okay well I have a feeling that one of my best friends is lesbian, why? well the other day we were watching Vampire Diaries and Glee ans shee cuddled up to me and had her hands quite far up my leg. and when you stay at her house she has a double bed so we share a bed and when i wake up she always has her arms around me.
Now don't get me wrong i have absolutley nothing against gays but it worries me. Shoud I confront her about it or not?