Having sexual feelings for friends can be really common but can be a really difficult situation to deal with. If your friend is dating someone then having sexual intercourse should be out of the picture and you should try looking around for another guy who is single and is someone who you and the partner both agree on having sex. On the other hand if your friend is single you can start of slow by telling him that you are interested in him and see if he is back. You shouldn't skip straight to sex because you want to make sure the feelings are the same and you are both are willing to have sexual intercourse because you never want to ever force someone into it. Now also when you have sex, there are consequences these can be STDs, hard feelings, pregnancy, and even losing a friend. Sex is a human thing to do but a lot can happen from it. I would say if you are going to have sex make sure you have at least two forms of birth controls which an example would be the pill and using condoms, or an implant and spermicide. You have to be able to handle whatever the consequences could be. Now people often do break up or split up after they have sex and this could be hard to deal with. So you must be prepared for this to possibly happen. Also because this is your first time, you must know that it might not be all that you're expecting. You might not (probably won't) have an orgasm the first time or bleed. It might hurt or it might not. Sex can be fun and a pleasurable experience but it takes time and a someone who is responsible enough to handle all that comes with it. Good Luck:) and BE SAFE!!