I accidentally stumbled across my ex-girlfriend's profile picture on facebook whilst I was searching for my sister (same first name) and for some reason I was overcome with this emotional pain... it is hard to describe. After this subsided a surge of adrenaline kicked in. Then I had a moment of clarity that I am not happy with my currenty lifestlye and reflected that I have effectively isolate myself in my escapism for the past 2 years.
A little bit of background:
-it was my first long-term relationship, lasted 3 years, she broke up with me, it ended rather abruptly, the relationship wasn't healthy
-2 years have passed, no interest in rekindling the relationship, realised that we were only strangers to each other in the end
-post-break-up I've had panic attacks on 2-3 occasions when I bump into a friend of hers or anything that has a strong association to my ex-gf
I still seem to really be occupied by it emotionally, after all this time and i don't know what to do. please help
Why do I react the way I do?