It's you feeling strongly for a boy. Pretty normal for teens.
A lot fo times you hear about people not spending as much time with their friends, once they find a gf/bf. It's extremely normal. Maybe your friends will understand, as long as you don't ditch them completely. Do your friends and your bf get along? Do you all do things together? Maybe when your bf spends time with his friends, you can spend time with yours etc. If you're really worried, just be sure your friends get to see you still. Once they get involved in a relationshiop they'll undertand lol.