don't worry pal, premature ejaculation is self-curable.
do this every time you are to masturbate or have sex.
when you feel like ejaculating stop, or squeeze your penis very hard but not painful. after a couple of minutes, try engaging on the sexual act again. and when you feel like ejaculating again, repeat the mentioned procedure. do it like for how many times you want. i suggest 5-7 times for first timers. repeat it again and again. this will get you conditioned to last longer..^_^