Something I did... (long post)

I really would like some insightLast year a younger employee began at my workplace, I didn't care much for him figuring he was just an extra hand to help out; was I wrong. The 2nd day he started to talk to me. We hit it off immediately and got along great; he was friendly and funny. We bonded quite a bit by the third week on, he learned I was gay and that was where our relationship began to change. It was small things at first; he would ask for help with dumb things, need assistance down from a 3 foot ladder, asking dumb questions and getting me to tutor him on simple subjects.I was clueless because our age gap was pretty wide (10 years). Other things began to get obvious, he would walk into me, hold onto me in situations where he didn't need help; generally a totally different personality when we worked alone (more effeminate and needy) One day a co-worker asked me what was going on between us, I said I had no clue ( which I didn't) From there on I became aware to a lot of the advances he would make. He would follow me everywhere, he would make excuses to be alone with me, and he would stall when it was both of us alone. One day he complained about his sore muscles on his legs and asked me to massage them, so I did (I was an idiot, yes) I wanted to see what his limits were and I began to work my hand up his thigh, I got pretty high before I decided I didn't want to push those boundaries. From there on for 3 consecutive weekends at the end of the shift he would stall, and be close to me, you could cut the tension with a knife. I never made a move because of his age and because it was work.One day after work he texted me and said he wanted me to stop doing everything like I was the one making all these moves, I honestly was offended. So I began to avoid him, I did it for 2 weeks before he finally confronted me about avoiding him. I let him talk before I finally laid out everything that had happened and how he had initiated everything. He burst into tears and came out to me on the spot. We had a heart to heart for at least 3 to 4 hrs in the parking lot after work. I cried and laughed with him that afternoon. We agreed to be friends and to stop what was going on. This discussion changed my whole perception of him and made me look at him in a whole new light.2 weeks later, the touchy feely stuff started all over again and I began to avoid him again because I didn't know what I was supposed to do, I didn't want to get in trouble and I thought things were pretty clear. I wrote him a letter that talked about how I was starting to feel and that I was going to want more if things didn't stop and addressed all of the incidents from the previous days. We avoided each other for the week after saying very few words to each other if it was work related. One day he followed me to another part of the building assuming I went into a room and waited there for me. Another coworker came out and said he was obviously waiting for someone but was visibly dissapointed and just left. Another instance he followed me out of the building rushing up behind me, I stepped out and there were four or five people there , he came out right behind me and immedietly changed direction. I knew he was trying to talk to me.One day I went into work and he was standing there. I decided to say we should talk, he followed me to a private area and I asked him about the letter. I asked what he wanted and he stayed quiet, I told him why I wrote the letter just to reiterate the point. He then called me a liar about everything in the letter, when I asked what I lied about, he went quiet and wouldn't look at me. He got up and said "I don't need your bullshit" and walked away. I followed him, out of anger and frustration I said to him "Don't you ever talk to me about anything personal, I never want to hear it again and do not want be friends with you" he didn't say anything, he turned around and didnt look at me. He didnt show up for work the next day, my boss received a phone call and he resigned. I never told anyone about what happened, I know why he quit and it eats at me. I thought pushing him away was the easier route; it wasn't.It's been 9 months and I still feel like shit. I took time off of work to work on myself because the situation had bothered me that much. I see him around from time to time, if he sees me, he will dart into a store or turn around. I will do the same and it is so hard to go anywhere because I'm scared to run into him. I have a way to make amends with him, but I'm not sure if I want to. I want to know what was his end game? What did he want? These aren't questions I would ask him, but I am asking you. Anything to help put my mind at ease. Should I try to fix things with him?Edit: we connected on a very personal level, I've never met anybody like him in my life. Even with other relationships I had, I never bonded with any of them like that. Even when he broke up with his gf, he never even acted like that with her and they had a bad breakup.