Can't seem to pop a ***** when its most crucial? help me?

Okay so It all started when I came back from Reno, I hadn't had in about two months and i was excited to return to my hometown, because i knew was waiting for me there. The first day back Me and this girl (B) went into my car and started making out and i knew we were about to get off; she procceded to take of all of her clothes and i soon followed. she wanted me to pound her cheeks, however my was only half hard; I still put on the condom but it would bend when i tried to stick it in, so we stopped and it ended up being a fail on my part. I thought it was not that big of a deal, i mean there is always a first time for everyting. However, three days later i ended up taking the girl again (B) back to my house. However this time there was more pressure becuase all my friends were hiding in the closet watching. They were gonna watch me pound her cheeks, I was excited to show my friends how big of a pimp i am; same routine happened and when it got down to pounding her cheeks, my wouldn't get erected. she even sucked my while it was soft and little, approximately 2 inches. It was a rather embarring feat, and my friends now call me softy. What does this mean? Am I turning gay? Do I have erectile dysfunction? Or is all in my head?