Was I molested?

[quietWarrior694]

So when I was 15, I was texting this guy (who was 17 at the time) and he started acting kind of weird. Then he initiated sexting. At first, I was like ok sure because I honestly didn't realize what he was doing, but then something he said made me understand what was going on, so I replied "ok bye" really fast and shut off my phone. For at least 3 days later I was unable to eat or do anything with much energy. I just felt so dirty and worthless.
Nearly 6 years later he messaged me on Facebook saying sorry about it, and that he had an unhealthy attraction to me. I stayed distant in the conversation because he made me nervous still, but he kept talking. He went on to say that had he been given the chance he would've slept with me. He then said he was coming back in town and wanted to meet up. I said no, but he was very insistent.
I'm not going to meet with him, but I was wondering if what happened when I was 15 was considered molestation or sexual abuse or anything? I just feel like I was used and I'm trying to get some answers in light of our recent conversation..
Another side note, for years since then, I've been unable to have close relationships with guys without drawing back and shutting them out completely. I feel like there's something wrong with me.
I'd like to be clear here in saying I'm not trying to make anyone look guilty and I'm sorry if it came across that way. I was simply trying to get some answers and I thought the best way to do so would be to be honest about what happened. I'm not going to be meeting with him and I had already decided that way before asking this question. There's no reason to push me down and make me feel worse than I already do just because I have questions about this stuff. I never did anything to any to you...