I think, if you have an interest in someone, you let that grow a bit between you. Start telling them things you like (movies/shows, whatever). Things that are fine and normal to share with others.
I also want to add, even if someone hurts you (wants to hurt you), you can learn to deal with that. I think you should learn how to deal with such issues by experiencing them, but of course in steps.
Indeed, I would suggest something similar to Red above me. Your first step shouldn't be to start a relationship, but I'm assuming you would want to eventually have one(?). Either way, try to talk and be more open with friends, people you can trust. If indeed they (or anyone else) seem to make an issue with some things you address, move on.
Heck, if you're really into someone and you get to know each other, one of the first things you can say and admit is that you have issues being open, that you're afraid/scared to do so. Me and my partner do this all the time if we want to talk about things, but are afraid to do so. Always turns out better if we know how we feel and what the issue is. It's the start to tackle any problems
And this has always been my 'way of life': Address the problems as soon as possible, so it's out of the way and you can move on and do other things.