<human>: So I'm in a new relationship with a fantastic girl. Trouble is, I recently went overseas where I use to live and caught up with my childhood friend. I haven't seen her in a couple years as I usually go back with family and I catch with her in my spare time.

This visit was a lot different than the previous ones. To make a long story short we had intercourse multiple times and it was great. However, we knew a proper long term relationship was never going to work and tried to make the most of our time together while it last. We did toy with the idea of waiting for each other until one of us was able to move to another country when we were older but the distance and time was impossible. This happened around a year ago.

Now I'm in a new relationship with a smart, funny and intelligent girl. The problem is I still have feelings for my childhood friend and it's starting to affect my present relationship. I can't stop thinking about her and the time we had together even though I know its not realistic to keep holding onto these kind of dreams. My girlfriend has started to notice that I've been acting differently and doesn't know what's wrong.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Went overseas to see childhood friend, great time together that culminated in multiple acts of sex. Now that memory is starting to affect my present relationship.