Dont do it man, you will regret. You also wont be able to change it once you have done. Why dont you want to be in a long term relationship? This would be thebest thing that could happen to you. Ok your previous ones may have not worked out but that does not mean sleep with anyone just to get a number under your belt. Being with one partner would do you the world of good and Im sure there are plenty out there for you. Its just a matter of finding one, matches are made in heaven. Sometimes its about the patience.