Well, I was 15 when I first had sex and it was with my first (and only, so far) boyfriend I ever had. Before we had sex I was like you, mainly worried about getting pregnant. And it was a good thing I was because, though my boyfriend was try to be as careful as possible he didn't realize condoms expire and he had one that was over 2 years past it's exp. Date. So that why I find that me being responsible for birth control is better then him. He's very prtective of me and all but when the situation is in my control I just feel better.
Before you have sex you have to know what sex means to you and how you personally feel about it. And if that agrees with the situation and you're safe and ok with it then by all means enjoy it but be careful.
Now that I think of it, my boyfriend never ever pressured me to have sex with him but he did kind of pressure me to get birth contrrol other tehn condoms. And I kind of wish i'd have seriously thought that out because now, thoguh i'm glad that I feel very safe with not getting pregnant I did submit the both of us to a good 4 months of utter hell trying to get the right form with the least side effects. But he stood by me and helped all the way and through it all we're still good so....
I guess I drifted. But like everyone else has said, make sure you're ready. Make sure you're safe and make sure you really want to have sex.