How am I supposed to recover from this…again?

I’ve been through this situation once before, I met someone and life was going great, things seemed to be perfect, we made it 4 and a half years, we were engaged since 3 and a half years. I gave her everything I am, I was in the military at the time, and I pretty much paid her way through college. After my contract was up I moved back home, I got a job as a glazer, things were going well. then one day on 4th of July 3 years ago now, we were going for a drive up the mountain, someone was stopped dead in the road I swerved to avoid rear ending them, we slammed into the guard rail, I shattered my wrist in the accident, which in turn cost me my job, I was struggling to find other work, struggling to make rent, I was living off savings at that point, then one day her and I had an argument about something, I can’t quite remember and it escalated into big verbal fight, she told me she was done, and that she had been cheating on me through the entire 4 and a half years of our relationship. I felt as though I had lost everything, my job, my car, my sense of self and the one person I thought would be there abandoned me and crushed my spirit and will, shortly after I had to move back in with my parents. I tried taking my life, I ingested a ridiculous amount of random pills and alcohol, I slowly drifted off, I was awaken in the hospital getting my stomach pumped very unpleasant. They said if I had been a couple minutes later, I wouldn’t be here, my breathing was shallow and my pulse was damn near flat line. I picked myself up and tried to carry on the best I knew how. I had gotten my degree in culinary arts, because I loved cooking a way to relax, then I started my own computer tech business things were seeming like they were going to be okay. 2 and a half years later, Mid to late January of this year, I met this girl, and things were going so well, I’ve never been able to openly communicate like that before. She mentioned her ex was crazy, but she broke up with him in California. A little after we were dating my car was vandalized twice, once at her place and once at mine. So I got concerned because I don’t have any enemies in my home town. So I started snooping around Facebook and found out he moved all the way from California to here. We started seeing him at random places like stalking us, we both got orders of protection against him, they both were served and he was arrested, a detective picked up the case, and arrested him again with a warrant. He found fucked up stuff inside his apartment, and 2 boxes for gps tracking services, one of them was on her car. So that explains how he knew where we were. He’s been locked up since then. Once the police and insurance got involved, the car I was buying from a friend, he backed out and left me car-less, which hurt my company and I lost a lot of clients, and it hurt school I had to withdraw from this semester which set me back even further. Then out of no where after all I went through for her, she leaves me out of no where when I’m at rock bottom. I am sitting here finding those same feelings around the time I attempted before resurfacing, except this time, I have a gun and I know there is no coming back from this one. I am just scared and alone, and I don’t know how much longer I can bear being here.

tl,dr, I gave the women I was with everything I had and lost everything in my life, to be abandoned as if I was nothing at all. how is there a bright side to any of this?