No erection during blowjob

Last week my girlfriend made me a blowjob and I didn't get fully erect(or finish). I am 17 years old and I have a relationship of 1.5 years. It was my first time that my girlfriend, she is 18 btw, made me a blowjob and I am really pissed that this happend. My girlfriend is very nice and seemed to don't matter since other times that we make out I ofcourse get erected. In 2 weeks we agreed to have sex . I am a virgin and she is also a virgin. I am not afraid of not having an erection during intercourse but seep inside I have these thoughts... Maybe it's that she is not very good at blowing(she finds it difficult not to put teeth, and she doesn't put my pen*s deep enough, she also blew me for 10 minutes...which may be short time for me), but not so bad either (she sucks, she licks). My friends told me that you feel warm when the pen*s is inside the mouth, but it didn't, it wasn't much different than the average temparature in my pen*s, so I dind't feel much difference...
Maybe its psychologicall, because I was holding myself back for so long and now that I don't have to, my subconscious hold me back. Or even that because for more than a year our relation was purely Platonic and mental(only kisses, hugs etc), and I now have realized that the way I love my girlfriend might not be sexual but something like a dad daughter protective love.
I don't now maybe stupid thoughts, but I can't get them out of my head. I love my girlfriend, but if my mind will connect oral stimulation and sexual relationships with something unpleasent I could be heavily traumatised.

Communication really is key.
Since you've been together for over a year,
im guessing that you talk about everything, and share everything with eachother.
if that is the case, then you need to be open about this as well.
and if theres something she needs work on, then mention that to her.
dont worry about offending her,
because she needs to be open with you to.
I mean, try to be nice about it, but dont glaze over everything and tell her you loved it if you really didnt.
and yes, it does take work, that part is true.
when me and my fiance started getting sexual,
my main thing I needed to work on was handjobs.
and frankly, I still think I suck.
but with the confidence and guidance my fiance gives me, I continue,
triing to improve.
so next tme, beforehand just let her know what you'd really like her to do,
and clear your mind,
focus on the girl and on what she is doing, and how it really feels.
:]

You already know your problem. It's because that you were too nervous and had too many things going on in your head, and she's not very good at it yet.

Next time she does it, if you like what she does, encourage her by telling her that you like what she's doing, or moan in approval. If she does something that needs working on, you can ask her what you'd like her to do, like telling her to go faster, etc.

It takes a couple awhile to really get in sync with each other and get to know what makes each other feel good and what doesn't. This happens with all couples, virgins or not. You two just happen to be inexperienced with it, but as you go along and with a lot of communication, you two will work it out.

maybe you were tired and sick...

I agree with Mysterywolf.
Shinobi, you have been holding back for a year and a half. Your mind is probably spinning. AND you are a virgin. You are probably very anxious about the whole thing. Try to relax a little. NO ONE is good or comfortable the first time or two. Or three ...

All you have heard about is how fantastic sex is. And it is. But you and she have a lot of pressure on you both. Again, relax and keep talking / communicating with each other.

And don't set a timetable for intercourse. Do it when you both feel that it is the right time for it. AND please use protection. Condoms are a good form, although it is better to also use hormonal birth control also.

Take care of yourselves, and
Good Luck!!

Tommorow is going to be the day... We are going to have sex... I hope everything goes fine... BTW she uses hormonal birth control and I will use condoms so there is no problem. Thanks for your concern bimjob. Until now, we haven't tried blowejob again, we stick to other stuff... because I was a little freaked out. But I think after tommorow my psycholochical stress will go, and I can relax...