I rejected this guy who was my friend. Now he's a jerk. What should I do?

[Charlie annnd Jennie]

Please read all of it!

I met this guy (let's call him John) through a mutual friend in the beginning of my freshmen year in high school. John was friendly and he had my sense of humor, which is cool and rare, so we clicked as friends instantly. I always felt like there was this weird tension between us, but I ignored it.

After about only a month and a half into the school year, he confesses to me that he's really liked me and wants to see if things could work out between us as a couple. I told him that I didn't see him that way and that he was more of a brother. I know how guys hate to hear that, but it was the truth! He was too much of a valuable friend to me. Well, anyway, he didn't take the rejection well. He went into a two-week period where he didn't talk/barely talked to me. Afterwards, we talked, I forgave him for acting the way he did, and things went on as usual.

About a three weeks later, we were talking and he confessed that he still liked me. I tried to ignore it and tried to laugh things off while making poor jokes (that's what I do when I feel awkward). Time goes by (blah, blah) and we go together to his Junior prom as friends. Things got awkward there as John would scare off the other guys who wanted to dance with me. He was obviously still attached. Still, I tried to ignore it. I thought it was only a crush he had on me and he would get over it.

A while later, he confessed yet again (always in casual passing when we were talking on the phone) and I got uncomfortable. We argued over it. A few days later, I invited him over my house so that we could talk things out. Stupidly of me, things got...intense. I used John in the moment by giving him the wrong impression when we started to kiss. I felt awful about it later (please don't give me grief on it; I know it was a mistake) and talked to John about it. He got angry and, to get me jealous, began going out with a girl who, weeks prior, he was making fun of behind her back. We argued the entire time he was going out with this girl. John became quite the jerk while dating her, even on-and-off ignoring and fighting with his best friend about his new girlfriend.

Two or so weeks later, this girl dumped John and he came running back to me. He told me that he just wanted to be friends. Living as friends didn't last because John randomly confessed how he liked me over the phone yet again! It totally caught me off guard. I turned him down completely and rather harshly because I was getting tired of him confessing to me. I told him that we could only ever be friends, if anything. Now, seeing as he didn't ever take direct rejection well, he fought with me.

Now he's just a jerk. You'd think he'd avoid me, but he likes to annoy me instead. I think it's because he's embarrassed over how open he was with me and how coldly I turned him down. Now, he leaves rude Facebook messages on my Facebook wall and sends tweets over Twitter to me that make fun of me. He even got his cousin and a friend to do the same thing. I've been ignoring him, but the harassment isn't stopping. Should I delete him off of Facebook? (I can't for Twitter because he could still mention me with @ signs and my account would show me was he is saying still.) I don't think I could directly confront him because his harassment is little jokes he knows annoy me and he would only call me out, saying, "Geez, Luna, I was just kidding! You don't have to be so serious." What should I do?! Could someone please explain to me why John kept coming back to me until the final time he confessed to me when I embarrassed him?

PS. I'm switching to another school that is nearby (for other reasons - not because of John), so I don't think I'll ever have to confront him in person ever again.

BTW. This is in the LGBT section because, even though our relationship was simply girl-boy, I'm bisexual. Besides, I think the people of LGBT give better, heartfelt answers on Yahoo.

[Mikhail Romanov]

You should delete him on FB, and give him the silent treatment. Don't respond to his annoying comments, and he will get the hint, that you're not ok with the way he is acting. Hopefully he will get it and stop acting that way.

[MzCalypso]

This guy is obsessed with you. I think you should block him on Facebook and report him as a stalker on Twitter.

You've got to end this "friendship." He's one of those guys who believes that a 'real man' will pester a girl until he wears her down. It's moronic, but there are guys like that.

Break it off COMPLETELY. And if he persists, tell him that you will report the harassment to the cops.

If he still persists, report him.

[Mild hot]

if he keeps doing said things to you, tell your parents. if he's doing threats, tell the police. but keep the tweets and FB comments for evidence. delete him from FB and Tweeter.