I'm mid-late 40s, had a lot of partners, and he's the only one that has never ejaculated with me! I've gone through all the possible scenarios for reasons why...
Heavy porn user...doesn't seem like him (he's not pornified IYKWIM), so I'd be surprised.
Death grip wanker...maybe, but it's not as though he loses his erection (no problems there!), so I'm doubting lack of stimulation. He makes it very clear he fancies me too.
Other woman...it's always possible, but I've met a couple of his friends, family and co-workers, which would've been risky if he was up to no good. Always thought his excuse for not wanting to come was odd though, but never made a thing over it because he is such a closed book.
He blames not being able to talk/open up on his ex, who he says used personal stuff against him. I reminded him that I was not his ex!
Like you, I just really want answers.
He's never struck me as a player or a bad 'un, but ultimately I can't be with someone who makes me second guess stuff. We're adults and should be able to discuss things like whether we are "casually dating" purely because of logistics (his child care and work commitments), or whether he simply doesn't want more from me, FFS. This all flared up because we didn't celebrate our 1st valentine day (good), then he deceided to celebrate the next (moving the goal posts), but then decided not to this year
. WTF am I supposed to make of that?!
I can handle being dumped but I find it very hard dealing with not knowing what's going on, and I've told him this 
Next time I think I'll look to date a politician or a spy so I have a better chance of getting straight answers to "awkward" questions 