Obsession is bad

I'd rather be obsessed by food or drink than with another person. There is nothing so frustrating than to be obsessed with someone. When I fixate on someone I really go all out. My life revolves around that person and he affects every aspect in my life. I even take up the same interests as him, or at least I make a half-hearted attempt to.
It's been a long time since I did this. Thankfully, I've stopped obsessing about people. I wouldn't go as far as saying I'm nice and normal now, but as I matured a bit I became more independent, and gained some self-respect. Now I slap myself down if I can sense fixation rearing its ugly head, which it almost never does anyway.
When I did use to obsess it was almost always about a guy of course. Even when it was mutual, I would always go the extra mile. The more he withdrew from me the more I'd push. Sometimes it was unrequited love, sometimes it was mutual. In either case, nothing good came out of it. In the unrequited cases I was too chicken to make my move but too possessive to relinquish the thought of him, instead I tried to make sure that I was around him as much as possible, in seemingly innocent ways. I'd just happened to pop by his house because I just happpened to walk by. In the early days, when I still had zero experience and was a freaky recluse, I'd form obsessions with guys I didn't even know, who were just casual acquaintaces at work and who had done nothing more than speak to me nicely. I looked one of them up in the phonebook and found his address and made a point of walking by his apartment building several times a week, like some fanatical stalker.
Then there were those crushes or relationships which weren't solely in my head, but that actually existed. In those cases where my feelings were requited, it started out well but as time went on I would always start to fixate, and since almost no one likes to be with someone who's clingy, it always ended badly. With those crushes that didn't know about my feelings but who I suspected felt the same way, I grew bitchy and unstable whenever I felt them slipping away from me. If I thought that their interest was waning I'd become cranky and weird.
Even when your love is requited, becoming obsessed with someone can never lead to anything good. I think we lose ourselves a bit when we do that. We become so focused on that person and his/her actions and words that we forget about ourselves. I hate that feeling and I hope I'm never in that place again. Because as I've realized, we can control some things but we can't control other people. We can't control their feelings or actions. All we can do is be ourselves and try to live our lives with some dignity and self-respect, and treat people the same way we'd like to be treated, and accept that other people are different from us. It may be my imagination, but I think I make friends more easily now that I'm not so desperate and clingy. Not only that, but I actually manage to keep them too.