I have premature ejaculation.

i have not had many girlfriends iv have had about had about 4 real relationships and a few silly ones when i was younger, im turning 19 this march, had never really been sexual with any girls until summer last year my last girlfriend and i had sex quite often but i always ejaculated after about 4 or 5 thrusts, which is really embarassing, i mean a friend of mine said the other day ''i think something was wrong wiv me the other day i came in like 3 or 4 minutes'' n everyone was like ''oh my god thats really bad''.

i tried afew techniques like the squeeze technique and kegal but nothings changed its got worse if anything,

one thing iv noticed aswel is that it even happens during masturbation,

this is what happens i could masturbate for hours as long as i keep my head clear or think about something completely not sexual but as soon as i think about something sexual or look at some porn im gone in a matter of seconds,

it really annoys me because sex is somthing im really interested in and seems asthough theres nothing really better to do in life and i cant enjoy it at all, n i feel like a wimp saying iv only had sex with 1 girl, but im affraid to do another because she mite say somthing and that wud be so bad for me.

what can i do?
has anyone ever actually cured their premature ejaculation??
has anyone got a case as bad as mine?