I know I should stop contact really but its sooo hard because I really do like him but I'm worried the longer this goes on the deeper I will fall and then the harder it will be.
You reason for not breaking it off, is that you really like him and know you will get hurt.
OP, me and dp started as fwb. I ended up feeling like you and nearly called it off and cut contact through fear. I posted here, under a different name. I was, very nicely, told I was off my head to not at least have the cinverstation.
The reason for that was me and him used to see eachother everyday, even not having sex, used to do our weekly shopping together because we ate most of meals together. He asked me to stay with him for a few weeks when I was, moving from rental to my bought house, when i kobed in he helped me move and decorate it ready for my kids. He would stop in each night and morning, before and after his night shift. On a morning one if us would prepare breakfast and the other my sons packed lunch. On an evening we would cook together. When my son was ill, he would still stop off but not come in, just drop something as a gift for ds. Ds had met him as he was a family member of a friend, so only met him in passing, but he still didnt intrude on mine and ds time together. He respected my boundaries regarding ds.
We were like a couple and it was quite obvious to mners that he wanted the same. The next morning he came in a cuddled me and then we had the converstation. A year later, we are happier than ever.
But, as I said, it was obvious he wanted more too. So the question is, how sure are you he doesnt want more?
I believe DP didnt, I think, as a form of self preservation. It took other people to knock some sense into me. I would think about that, if you are absolutely sure he doesnt want more and you cant take the rejection, dont do it.
If you prefer to just know either way, it makes sense to just speak to him.