i think i might be bi but tbh i have no idea i mean boys are hot, girls are hot... but ive never really had a crush on a girl and idk... i often read i should "experiment" but i really have no idea how to do this since every single person around me seems to be straight?

Experimenting would help in you figuring out if you are bisexual but I don’t think it’s necessary. If you find your self fantasizing sexually about girls and that turns you on or have a certain girl or girls you can see yourself being in a romantic relationship with that could possible help you figure out if you’re bisexual. Ultimately you don’t have to label yourself and you can just do/be with whoever makes you happy.  

I'm in a long distance relationship with my girlfriend, could you give me any ideas on what to do or give her on Valentine's Day?

This is hard seeing as I’m really bad when it comes to getting other people gifts but anything thoughtful and meaningful normally does the trick with me. Maybe a college/book of your favorite moments with her or if she’s into reading you could make bookmarks listing things you love about her.