I started a new relationship, we are currently dating and looking where it goes. 

But now I am stuck in this dilemma, I don't know wether I should set boundaries and wait some time until we get physically closer because in my past it happened too often, that those boundaries have been ignored, or I didn't even set them and my body got taken for granted.

 I am afraid of those things happening again, I wouldn't really mind being physical from the start because why wait lol. But nevertheless I am conflicted, this is the only fear I have.

I have this feeling, that I have to set these boundaries just once because I never really did that and stood by it. But on the other hand I don't really get why I have this thought process.
I just feel like I jump in too quickly in those situations but otherwise I don't get why I should wait... It feels like I have two sides in my brain arguing with each other. I don't even know if this is impulsive because I thought about it and first I was sure I didn't want to wait but now all of these fears rise up and I get unsure. It's not like I don't trust him, we've been friends for a couple of months and started dating recently.

Can someone please help, is this thinking irrational? How do you figure out what you really want... I am really confused and conflicted.