ask: why am I always horny

Hi Anonymous,
Oh, to be 19 again... :) Seriously though. What you describe is normal for an adolescent adult. Masturbation is normal and healthy, assuming it isn't conflicting with your ability to have a job and friends. Be sure you are protecting yourself from unwanted pregnancy and STD/STIs when having sexual contact with your friend or anyone else. It sounds completely normal to me that you would be leery of having sex with others. If your friend is comfortable, and it's what you know. If however, you are developing more feelings with him, you may want to talk about that with him.
In my non-medical opinion, I don't see anything wrong with what you're doing. You're young. Be safe, have fun, and make sure you are being true to yourself and your ideals.
Hope this is good reassurance for you. If you need further support, let us know.
You may find this article interesting: May is National Masturbation Month

It is very naural for both boys and girls in teens to get horny very frequently since body harmones, particularly sex harmones, become very active. Nothing to worry but anything has to be kept within limits. It is best to calm the urge/mind by masturbation but see the inner walls of vagina, which is very sensitive to touch, does not get damaged due to vigourous rubbing of toys. when horny try to read some spiritual literature