<human>: So, my ex was the King of The Friend Zone for months, then he finally just asked me to hang out before he went to drill for the weekend, so I agreed. Long story short, I fell hard and fast, and everything was wonderful. Then I started noticing he never called me beautiful anymore, never asked me to send him pictures, just normal ones of my face, when he used to constantly before. Just didn't do the cute, sweet little things that got me hooked. Come to find out, I was the secret mistress that could get him in trouble with the militaty since he was in the middle of a divorce, but since he came clean and I knew that had to have taken a lot, I decided to stay. So technically, he was risking everything to be with me, sweet in a way. At this point we had been together a few months.

 But then...we got in our first real fight over a misunderstanding and he just changed...super jerk, yelling and ignoring me and he pulled the "I'm not wanting to be in a relationship with anyone right now, let's take it slow" card.

Well, turns out he had joined a dating site, so I knew his telling me he would only be talking to me was bullshit. He irritates the piss out of me, seeing his picture alone makes me angry...but I can't stop thinking about how happy I was in the beginning. How do I get over it? Because there is no way I'm going back to feeling like I did in the end.

Can you summarize the given text in a few sentences?
<bot>: I can't stop thinking about how happy my ex made me when we were first together, before he turned into a straight ass. How do I stop it?