I realized that I'm bi, and I now have a girlfriend, but I don't know how to come out to friends?!?

first you have to talk to melanie, tell her that you wanna tell your friends but that its hard for you because you fear theyre gonna act differently around them and you dont know how to tell them. ask her how she came out to her friends and then youll at least have an idea of what to say and how to do it. if you still dont feel comfortable after talking to her then wait a little while and think about it. melanie said that she would understand if you needed to wait so let her know that you want to be with her and youre not ashamed of being with her youre just not ready for everyone to know. shell understand but the important thing is wait till you feel ready