So I posted a few days ago about how I couldn't get it up. Well I finally got the damn thing up, and boy do I mean UP. Like I was fucking rock solid tonight.

Well so we fucked for like 45 minutes maybe an hour and I was sweating like crazy all over her but I just couldn't cum! It felt great and we were really going at it, but I never even felt the buildup of the cum either. I don't know... any help?

I find taking a piss beforehand helps me with problems like this. Other than that im not much help

All I can say is it must blow to be you... sorry mate.

It's possible you were so stressed out trying to get the erection that you couldn't relax!
I'm unable to cum during sex and I'm reasonably sure it's because I get so aprehensive and tense.
So, just relax, perhaps mutually masturbate and become a little more comfortable. Then incorperate some manual or oral stimulation, finally, sex!

The bottom line is just to enjoy it, as it becomes less and less pleasurable the more you obsess over it.

Goodluck!

Your urethra literally ate itself in pleasure.