<human>: A few years ago I met a guy who was temporarily living in the same country as me. We met on his first night in this country and saw each other almost every day until he left (roughly six months). I'd had long term relationships before meeting him but never felt for them as I did for this guy. Long distance was never an option for financial reasons and I am unable to move there as I have shared custody of my niece. We stayed in touch and talk now and again but haven't seen each other for two years. I've dated people in this time but nothing too serious.  I thought I was over him until I met up with our mutual friend, who I haven't seen for a while, and I suddenly felt really emotional about the situation again. 

I may have the opportunity to see him at the end of this year but I am unsure whether I should take it for several reasons. Firstly, I'm quite an anxious person and for some reason the thought of seeing him makes me feel really nervous. I have had panic attacks in the past and really don't want it to happen if I see him. Secondly, seeing him will not change our situation. Although I'm not completely over him I feel I have come a long way in getting over him since he left. There are still feelings there but I don't think about him regularly anymore (until now!). I don't want to go back to square one and have to get over him all over again as being together isn't an option. Finally, I have no idea where his head is at and whether he is seeing somebody. I don't know if I would want to see him if he is in a relationship.  

I guess I just don't understand why the situation makes me so anxious and I'm not sure if seeing him again would benefit me at all. I'm sure I am just over complicating the situation which is why I'm turning to you lovely redditors for some advice.

Summarize the given text in a few sentences.
<bot>: Had a short relationship with someone I ended up falling hard for. Nervous about seeing him again and not sure if it would benefit me!