is it possible to have too much foreplay?

hey, im 17 and ive been with my girlfriend for 5 months . whenever we get sexually active , she likes to kiss around a lot and tease before anything really happens . I'll end up having an erection for over two hours before we finally get going . When she gives me oral though , its as if im burned out and barely get to enjoy it , although that could be because she goes at a very slow pace, and only fondles with the top of my penis . Then , ill give her oral for 10 - 15 minutes , and i can tell she's enjoying it , but when it finally comes time to have intercourse, i just cant seem to fit my penis in. I wouldnt say I have a large penis, but its maybe above regular in girth . Eventually, ill lose my erection too after holding it for hours , and i really feel bad , as if i let her down. Is there any advice as to whether too much foreplay can UNstimulate a guy, and how to fix this . I want to be able to enjoy sex with her, but if i cant even make it to that part , its really pointless , and i want to enjoy it when she gives me oral too, because she's trying. Huge thanks in advance .

Yars63 and David both give brilliant answers!
Also, talk to your gf about what you like and how you like her to do oral on you. Girls don't know without someone telling them. She'll be doing what she imagines she would like you to do to her.
Don't complain but tell each other what you like.
Also, it doesn't matter how big your penis is. All sizes 'fit in'. If you can't get it in then your gf is probably very nervous and is tensing up her vagina perhaps expecting pain. That is probably part of the reason why she likes such a lot of foreplay - because she isn't too keen on the penetration part.
Though ALL women like lots of foreplay! An hour or so isn't long to us! Try doing oral to her until she has an orgasm. By then she'll probably be feeling like she can't wait any longer for sex and be more relaxed and help you guide your penis in.
Good luck! You sound like a real considerate guy. Just enjoy learning about it all together! :)

I love foreplay, but even I want to eventually get to the deed itself.

Nope no such thing as to much.

Tell her how you feel. I'm serious, at first it might be weird but eventually you'll both forget about that time and it'll become regular. Also, some girls just like foreplay better (I'M SERIOUS) Try and enjoy foreplay more yourself, 2 hours.. TOO LONG.. Talk to her. Oh and for your penis, is she wet? Maybe shes not completely comfortable with the sex part. Use lube :D If she can't enjoy the sex you should help her enjoy it. TALK. Your her boyfriend!

If you ask me, there has always been too much emphasis on the final orgasm. Foreplay is misnamed. It not about what happens before something else. It's really not about the destination. It's about the journey. Both of you can affored to take your time. Let the erection come and go. Lie completely still for awhile with no activity until you go soft. Have her take it in her mouth then and let the erection return. Take her to the edge a couple of times but don't let her go over. Have fun and don't worry about the ending. That will take care of itself. Once in awhile, though, treat yourself and her to a "quickie".

- hey Mo !

- remember that foreplay is really not the same for boys as it is for girls.
- but it's not a bad thing neither if U can learn 2 control yourself & enjoy it.
- guys tend 2 get off quickly, so when we want sex, we want it now, ha ha.
- but for girls [who can get many many many many many multiple orgasms] foreplay can last forever & still they'll never get enough of it.
- next time, try jacking off before hand, cuz as U know, guys tend 2 need a break between ejaculations so that way by the time U get totally stiff again [from the long wait] U'll be ready 2 abide & go for it.
- good luck