<human>: We were together a year. I had just got out of a 5 year relationship and wasn't looking for anything serious. I ended up talking to a guy I worked with. He knew the situation and we started dating. I was very much in a weird place in my life at the time. I was conflicted and ended up talking to my ex (nothing physical happened) and he found out. I felt TERRIBLE and I spent the remainder of our relationship trying to make it up to him. I never wanted him to feel like that again. 

Anyway fast forward to today. He left for training in Korea a few weeks ago. He put no effort into trying to make the relationship work so I got really fed up and we broke it off. I was doing absolutely fine and I was actually happy for the first time in a long time. I found out that he lied about so much when we were together. I feel so stupid for all the effort I put in trying to make it right when he never cared. I feel so incredibly hurt it's not even fathomable. You know that sick feeling in your stomach when you feel so hurt? I have that right now. I don't understand how I allowed myself to love someone so much and get DESTROYED by one person. Honestly he has done more damage than I anyone I have ever met. Why would someone you love do that to you? I feel like such an idiot. I wanted to marry this person. Like honestly I would have travelled to the end of the world to be with this person. I am just so upset right now. Why can't he just disappear out of my life forever?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Made a mistake early on in the relationship. Spent remainder trying to keep relationship going. Found out he was lying to me all along.