Jealous person...How do i take the positive out of this? HELP?

I want to take the positive out of this, and grow spiritually but i dont know how. I am a female and i left my old work place because i got bullied out. At first i thought maybe i was just seeing into it, but i think i see more.One extremely jealous colleague, who also gave mixed messages of sexual attraction ( trying to be close to me, touching the small of my back, shoulders, asking for facebook details) managed to damage my confidence at the time, but thankfully not my self esteem. He had one connection for the company we worked for, yet i came in with a flood of new ideas and creative buzz that had everybody praising me. I had just been through depression and felt like i had to work really hard, so as to not go back into it. Depression affected my health and brought on panic attacks. That aside he felt like i was such a threat and acted in cleverly dramatic cruel ways. He'd insult me about culture, skin tone, make a huge show about not wanting to sit next to me, so other colleagues would laugh, ridicule me. Yet this was the same person that walked me home one time in the freezing cold and didn't want to leave, hovered around me when no one was there, was always asking me one question or another just to get me to talk to him, and when no one was there would sit so close to me waiting for me to say something to him. Recently he has gotten hold of my email and is now sending me a campaign idea that i came up with, yet has fixed it in such a way that i can't access the information in it, because he knows that i've left. He's such a piece of work. He's a nasty, disgusting, insecure, jealous bully, being around his inferiority complex is like walking on egg shells. Even better, i have thousands of ideas, i'm an ideas person, i started my own company before i signed up to work there, and i've gone back to that. I wanna take the positive out of this though, because i'm determined to shine. Now that he's sabotaged me, i can be twice as effective with my skills, and have twice as much freedom. What unnerved me the most was it felt as if this guy was trying to impress me at times, and imitate the way i talk, or proove he was equal, it was just tedious and pathetic. It was a bad idea because for one you cant humiliate someone whilst other people are there, then try and be around them when there's no one there, for two he brought on so much stress i had a panic attack and a seizure, for three my grandma had just passed away, i'd stopped being close to people almost two years ago after being attacked by my best friend with mental health problems, my health was becoming unstable again, and i was conflicted about my business. How do i take positives out of this, i want to move forward, and make the change i know i can, how?