[here_to_help(:]

First of all if you've never kissed a girl you might want to take it slowly at first. She obviously has had more experience, but that doesn't mean you have to have sex with her. It's okay to cuddle up with her and kiss her a little, but you should wait to have sex. You guys should talk about all of the risks of having sex and maybe go on a date first. Ask her out to do something fun, something you both enjoy. On the other hand, if you do have sex with her, you should still use a condom. Just because she is already pregnant it doesn't make unprotected sex safe. There is still a chance of contracting STIs or STDs, which you really don't want to have (especially not at the age of 15). So think about all of your options and ALWAYS use a condom if you're having sex.