What can i do to try to stop my chronic masturbation?

Im 18 and i really want to stop masturbating so much, i know its naturally that's not the point, ive been doing it every day since i was a sophomore in high school im just finishing my freshmen year of college so about 3 years. Sometimes its more then once a day sometimes 3-5, and i can go about five minutes and then be up and ready to go again. Its a really bad habit that i am trying to kick the longest ive gone is 4days and, i don't have a girl friend and come to think of it ive never had one i think the masturbation is severely dampening my will to want a girl friend cause the only one i have to satisfy is myself, not to mention for 18 i have a small dick its only 6inch's and i have like no stamina what so ever, so if i did have a girl friend im pretty sure she wouldn't be around that long. But ive heard you are porportioned and im only 5ft 7 so mabey im suppost to be at that lenght. That's another thing dose this much masturbation cause my dick to be this small or am i just **** out of luck and need to buy pills? and yes ive heard they don't work, but i mean look at porn stars a lot of them have taken pills and they obviously worked. But basically i need to seriously stop this all together and if you do know of some pills that even remotely work that would be nice as well, some one help me!