It's never easy to get over infatuation, but the fact that it's caused you to become bulimic is cause for serious concern. Your long-term health needs to take precedence over short-term indulgence, or you'll probably end up regretting it later in life. Since it's been over a year and there hasn't been any change in how this guy feels about you, I think it may be time to accept that you may never be more than just friends. People fall for who they do, and he might just not be the one for you, the one who's worth waiting this long for. Of course, only you can decide when it's time to start moving on from him, but it helps to be reasonable about how long you're willing to wait. Try to be glad that you're as close as you are; even if it's still not quite enough, it's better than nothing, and being his friend in the long run is better than being more and having it all fall apart.
There are serious health risks that result from bulimia, both physical and psychological. You said not to lecture you on getting help, but I can't stress enough how important it is to get it. Having a friend there to support you is a step in the right direction, but if it's not enough to get you to stop then you need more motivation. You said that your being bulimic was based on wanting the guy to like you, but it's been over a year now and how he feels for you hasn't changed, so I can't say that I think it's working. Also, the longer that you stay bulimic, the harder it will be to quit; even if you kept it up for two more years and you ended up getting the guy, it would be extremely difficult for you to resist the urge to purge in stressful situations. Try to quit while you still can, and you can replace purging and fasting with healthier ways to relieve stress. Good looks attract guys, but the majority of people who are anorexic and bulimic end up looking more frightening than attractive, and a strong will, good self esteem and confidence are as eye-catching as appearances.
Your parents do care about you, whether you think so or not. If you ever tried to tell them about your disorder, I'm almost sure that they would be understanding and supportive every step of the way, if a little bit worried. With your parents help, it would be a good bit easier to come to terms with your bulimia and overcome it, and plus you'd have two people right there with you to make sure that you don't relapse. Most likely, the reason that they joke about anorexia and bulimia is because you're thin; they don't do it on purpose. If they knew that you had a disorder, I highly doubt that they would make jokes about it, unless they wanted to drop a hint that they knew.
Whether or not you get over this guy is entirely up to you, but if you choose not to then I beg that you try to be healthy and responsible about how you do it. If you ever need to talk or if you have any questions, you can drop a note in my inbox and I'll do what I can to help you out. Good luck with everything!
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Sexual innuendo.