Sex is not fun any more

I was just wondering what happen when a person who's just 19 years of age stop getting sexual feeling. I mean sex use to be enjoyable to me now I don't even enjoy it I just do it. It's like, we kiss and everying but by the time to the penis to go into me I just don't like it, I get turn off. I am very worry about this and don't know what step to take. When ever I'm with me boyfriend and when we're making out I just to so bad but when every I feel that penis in me, the feeling is all gone. I just fake it, but one thing that keep me turn on is when he's giving me head.

Do you love your boyfriend? Is he the right partner for you? If you still want him, ask him to satisfy you just before intercourse. Then you are still aroused when making love. Or satisfy yourself during intercourse, if you prefer that.