That puppy is so adorable!! I want one so bad...
Angie, congrats on the twins
Jess, I read your post about the boy troubles on Friday, and you got great advice, but of course I want to chime in too

Some of the things you were saying sound really familiar to my situation. I dated this guy who was pretty bad on paper - older, unstable job, has a kid, etc. I wasn't even attracted to him at first, but he seemed like such a nice guy that I decided to give him a chance. The first couple months were great, but went downhill quickly after that - unfortunately I was hooked by then. We also had that intangible chemistry thing that is so frustrating. I should have completly cut it off with him after the first time we broke up, but I just couldn't do it. He had total control over the situation, which it sounds like Aaron kind of does too. I would walk on eggshells and totally worry if I did something wrong to completely blow the chances of us getting back together, which is what I always wanted. We broke up for good in September, but then started getting back into things in December. It didn't last long before all the old garbage started happening again and he cut it off at the end of Feb. When we were apart I tried to date a "good on paper" guy too, although I didn't really like mine so much. I would always compare him to the ex, and we just didn't have the chemistry. My problem is I would always remember the good things about the ex, but conveniently would forget all the bad. For god's sake he stood me up on my b-day because he was mad, and then was the one to break up with ME. I had this idea in my head that my feelings for him would overcome all these obstacles, blah blah. I always logically knew in my head that I needed to move on and get over him, but easier said then done. I think even now if he asked me to, I would stupidly get back together and the same stuff would repeat itself. I think your post says that you logically know that you should be moving on, but you don't want to tell him about this new guy because it will ruin any chance of getting back together. All I can say is try to be stronger then I am!!

I try to just keep telling myself that there has to be a guy out there with both aspects - a good job, treats me right, etc - plus the chemistry. I may be way off base, but take it from me, the longer you put your life on hold waiting for someone, the longer it takes to get it going again.
As far as if you should tell him, that's your call. Normally I would say don't lie about it, but don't specifically mention it either. He's forcing you to be the one to cut things off here with his immature ultimatum, and maybe that's what you need to do - regardless of if you really like this other guy or not. Do you really want to be with a guy who puts you in this position in the first place?
Ok girls, sorry for all the rambling, hope everyone's doing well!