Erection Issues

I am currently in an 8 month relationship with a girl that I love and care for very much but recently I've been having a bit of trouble. This is fairly embarrassing seeing as how I'm 21, don't smoke, rarely drink, and am in fairly good physical shape. The problem is that within the last week I've been having trouble maintaining an erection for any length of time. We used to have a very good sex life where I could last for upwards of an hour but within the last 2 or 3 months I've been ejaculating fairly quickly and now can't even keep the poor guy up. I think it's mostly stress because I am still very much attracted to her and still really want to have sexOn my own, I can get an erection at random times, I can masturbate (Which I have stopped doing in hopes of having it work again), but when push comes to shove I just can't keep it hard enough for penetration. When she's giving me oral, I can stay semi-firm but only reach "full erection potential"  right as I'm about to ejaculate. I'm already going through a fair bit of stress and this is only making the situation worse and putting unneeded stress on our relationship. Please if you could give me some advice or have an idea of whats going on, I would be very grateful.

[xgreenmusicx]

im having the same prob. let me know if you find out whatsup