Well, as the unofficial forum scrooge, I will say that you seem to be moving a bit fast. I mean really, your wife left in January and you already "love" this girl four months later? And THAT after you've only been seeing her for two months? Are you even divorced yet?

I don't know what Prilosect is, but Zoloft is an antidepressant. If you are taking it, there is clearly a problem. I think this girl sounds like she is thinking, which is good. (Too bad she has already done the family "mixing", though. I hate when people do that frivolously. It sucks for the kids.)

These are the signs I see that would indicate someone might still be thinking about their ex spouse:

depression
anger/hostility/jealousy towards ex, almost regardless of divorce circumstances
lack of divorce papers
desperation to reform an intact family unit

Good luck, but I think you ought to slow down a lot.