Even if you experienced something "strange or supernatural", you could always explain it away with self-delusion, coincidence or some other rational explanation. There is only anecdotal evidence, and it's just that: other people's stories, nothing more. I think that magic won't ever by accepted by science because so much depends on the operator, not on the formula used, and that clashes with the replicability principle. So there is no proof, and there can be no proof, I'd say. Like Alan Chapman says: "Truth is experiential". You have to get your hands dirty yourself, and all we can offer you is theories that may fail to convince you.
Extremely simply put: we are practising magic (or trying to) because we want to, regardless of the success of our spells. Every so often somebody would go on the magick or occult Reddit and post something like: "Prove to me that magic is real!". Mostly that person gets no answers at all, or only ones such as "Nah", "Don't feel like it, go play with your toy chemistry set", etc.
Moreover, beginners like me go constantly through what Tanya M. Luhrmann ("Persuasions of the Witch's Craft: Ritual Magic in Contemporary England", it's in the Library) calls an 'interpretive shift', from "I don't believe a word of it" to "Holy crap, this shit works!", from purely psychological explanations like "It's all in my head" to a firm belief in spirits and back again, or they may be completely unsuccessful and begin to search for a reason for this in themselves (again like me). Others feel drawn by magic because of its olde worlde mystique or unrealistic and overblown expectations fuelled by the media but stick with it due to curiosity and inquisitiveness.
You'd have to find out yourself if you really can make yourself more attractive or taller but for this initial inquiry, you must give magic at least the benefit of the doubt in order to persist in a quest where constantly getting sidetracked and reading a lot of books, useful or not, is almost a given. Many of us do not mind that there is no guarantee of success and become involved in an almost fanatical quest for self-transformation or experiencing the divine, all but forgetting about spells, successful or not - again, the 'interpretive shift' phenomena at work, up to the point where we are unable to explain what we do, or trying to do, to outsiders.
You may call this "Try it yourself" a cop-out but that's the only answer we can truly offer you, the truth of the pudding being in the eating and so on. No proof, no guarantees of success, highly unreliable and unpredictable… small wonder magic is considered such a fringe activity.