<human>: Can you condense the text into three sentences or less?

Had a girlfriend for about 4 years, it all started when she came to visit my country - I was sure she was going to leave in a few months but she stayed because of me (for about 4 years). We broke up about a year ago and I did whatever i could with the "no contact rule" to get over everything.

She kept sending me messages every few days or so.

I met a new girl - which is fun and great. - thats when the ex started sending msgs again - she was very hurt due to me dating someone new. - I wanted to protect her so I ignored most of them, but also tried to explain we didn't have a good match and that we should stop talking.

those msgs pretty much ruined my overseas trip with the current gf - i couldn't stop thinking about how bad my ex probably felt. 

on top of everything - even thu i didn't go 'online stalking' on the ex - i did eventually look at her fb page to see she has someone new.

All of a sudden i feel as if my emotions to the current gf has gone significantly down - she is perfect for me in every way but now I can't get my ex-gf out of my head. (even though it was about a year ago(!).

I would love to hear some advice about how to get over this - im very confused. There is no way to go back to the ex and i don't know i would like to, even if i could.

I love my current gf and we spend a lot of time together.

Why do I feel such "jealousy" and "sadness" to see my ex with someone new?

When i was with my ex-gf, I didn't feel like I really want to be there.

p.s

I know my ex loved me very much and did everything she could for us to stay together. but I just didn't feel the same way.
<bot>: Had a great time with new gf, ex-gf suddenly makes contact - I see she has someone new and this makes me less emotional to my current girlfriend.