What do you do when YOU'RE the one who's scared to commit?

Personally in that situation currently, guy I'm into is great, sweet, tells all the right things, so on but I'm so caught up in telling myself it'll end with me getting the short end of the stick as it's happened so many times before, that I can't see how much we actually click and get along. It's super frustrating
What do you do when YOU'RE the one who's scared to commit?
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