Hun, how old are you?? If you're anything less than 16 you really need to think a lot about what you think you want to do. Do not let your bf pressure you into it, its your decision. If you are so young, it could easily ruin your relationship. It will hurt like hell, the first few times if you're not sure of what you're doing. It's something you don't want to regret. Don't go into it thinking it'll make you closer, because it really won't, you want it to be something you share with someone who you already feel very close to and want to be able to share something very meaningful together. And make sure that if you do anything, please be protected, because the last thing you want to do is get an STD or find yourself having a baby in 9 months.
Please think a lot about what you want to do, if you have any doubts then you're not ready. Just keep waiting, the time will come, and you'll know when its right. And when its right, even if it hurts, it'll feel so special to you. But before you're ready it will make you feel like a fool.