Need ur advice quickly ! is the prostitute the only solution ?

i got some problem with girls whn it comes 2 ... i always b ok till the part where i shud pntrate..i embarrased 3 girls and there is no other girl want 2 have relationship with me not because i am bad or ugly but just cuz she dun wanna b embarrased like others....my friend telling me he will go 2 a prostitute and he think she will help me 2 get over this....i just feel nasty doing this with any girl and i feel its kinda nasty altho i always wanted 2 do it be4...but i am now 17...i am not nervous but i just feel sick....can that prostitute help me with her experience....shud i go ?!! plz need ur advice