IS Dat am IMPOTENT OR WAT?Huh?

Everytime i try to have intimacy with my girlfriend my D**** always fall down(making it difficult 2 do it) & she is always angry with me, (and i have a Big D***),
(make i no lie, i have not had sex just because of dis bleep up)

please advice on what to do if i am....

yes i have not made up my mind bcos d present relationship is complicated and Ex- want 2 come back........still confused

yes..."like her so much" bcos she disappoint me alot so i change from luv to like

I have so many things bodering and dis is one of them,
Wen i was still with my ex- she always smile at me but i dont notice anything den,
but wen i separated 4rm my ex-(which was abt 4month now)i saw her (ex-friend) 3 weeks ago
we xchange numbas,talking & suddenly she said she likes me and i answer thank u,thinkin she was just admiring my voice Cool, bt she said is not only thank u  ,she said she luv me and like 2 b going out with me ....Huh

i told her dat "its nt possible because her best frend was my ex- which most pple knew about us and dat u are telling me dis it will be a shame or disgrace 2 me" but she insist, always calling,flashing & texting me,   

Wat should i do please,

Am in a complicated relationship with a girl i like so much and now Am confused oooo because 2 of my Ex- want 2 come back to me.Funny enof they don't know each other and they left @ different times but now coming back @ d same time, Despite telling them that i have a girlfriend but they insist,

please wat shud i do