Is it possible to be in love with someone that only came into your life for a short time?

The heart longs for whom it longs. You can't control that. A couple minutes is all it takes sometimes. But 7 years ago, and a couple days means you have rose-tinted glasses. You couldn't possibly have known his flaws from a couple days of knowing him. You probably only had enough time for the whirlwind romance of the relationship, before any problems could arise. So he is perfect prince charming. Do yourself a favor, keep him in your memory, and not in your life. Fantasize about him if it helps you sleep at night. But what you had was a beautiful segment of the promise of something that never came to be, a moment that was fleeting and it passed.

Or you can do the romcom thing, and probably ruin your relationship now.

Okay, so you seem like a romantic at heart, to imagine that you don't deserve such happiness. Clearly, you do. Just not with him. Not now. Maybe not ever with him. But here's what you can do. Remember all the things about him that made you happy in the first place, and seek those things in your life, try to make them a part of your life. Not saying go out and cheat, please don't do that. There's a chance you can find it in your marriage now. Or something close enough. If you can't have decadent swiss chocolate, try to get what you can in your own life as it is now, even if it's a tootsie roll. I won't flood you with platitudes, since you're already cynical enough as is, so just try assessing what things you really wish for, then work on making those wishes come true. Alternatively, start working on a time machine. ;) Good luck!

ofcourse its possible, but in your case it appears as if you're not happy with your marriage

Oh yeah, it's possible! [: I would know..