@arian99,
This is going to be harsh. You are probably not going to like reading it.
You need to cultivate better 'best days of your life'. I would think your wedding day and the births of your children would be up there but hey, what do I know?
And I agree with hightor - find something else to occupy your time, your mind, and your thoughts. And maybe spend some time, instead of pining for this woman who has wised up and kicked your sorry ass to the curb, figuring out why you agreed to the
first vacation.
Yes, I mean the first one. Because even though you allegedly didn't touch each other, slept in separate rooms, yadda yadda yadda, the fact is that it was a deception and it set the stage for future deceptions. I assume you also didn't tell your wife about your communications with this other woman, and those predated the first vacation but they set the stage for it. So you planned that vacation at least a month or two beforehand (most likely). Hence you've spent the fourth year of your married life on this.
Your younger child was born, by my calculations, in June or July. So when you went on the first vacation, your wife was 5 or 6 months pregnant. And on your second vacation, your wife was 6 or 7 months pregnant. So instead of, I don't know, helping your wife out with your daughter (who was 3 or 4 at the time and they are a lot of work even under the best of circumstances), you dreamed about banging another woman and then you did so.
Become a better husband and father. Occupy your time with those things, if you want to make things work, instead of feeling sorry for yourself that your affair partner shut you down.