Teenage impotence

im a 15 year old boy, and i have this one annoying problem. my penis can get as hard as it needs to get as long as it is phisically estimulated. It can only get hard if my gf is doing me a hand job or oral, and as soon as she stops touching it, it goes down in a matter of seconds. same thing when im alone. first of all im gonna stop masturbating so much, but anyways id like to hear some opinions on these matter

[rmprdl1964]

First off I'm going to tell you that you are too young to be engaged in sexual activity with your girlfriend. At the age of 15 this type of a relationship can be very confusing, Both of you can end up with serious sexual problems later in life. One of these problems could be compairing your sexual experience to earlier experiences.
I very much doubt that you and your girlfriend will get married or spend the rest of your life together.

As for the problem of not being able to maintain an erection, this can be due to having masturbated a lot. The other possibility could be nervousness.

I sincerely hope that you will stop sexual activity and wait untill you are serious about making a serious commmitment. It will be worth the wait.

All the best.

Ron