You tell him it offends you. Explain to him you know his intentions are good, but it makes you feel like he doesn't think you're smart enough to think for yourself. I'm sure he just thinks he's being protective and he is unaware that it is upsetting you. He probably thinks it's "sensitive" because he is thinking about you.
Tell him it bothers you. It also depends what kind of stuff he's doing/saying. If he won't let you do something like talk to certain people then that's a problem. Otherwise next time he says something that bothers you don't get upset, just calmly ask him to stop doing whatever he's doing.
yeah your boyfriend might "suggest" you don't go walk by yourself or do something you really wanna do but if he's demanding you don't go out you need to stand up for yourself and by like "why can't I do what I want? I am my own person" right?
Let him know how you feel, but if he still dosn't back off any more than a decent amount of time, that CAN be a red flag for an unhealthy relationship. Unhealthy relationships can lead to dating abuse. Ya never know.