He won't date me but he likes me

So I like this guy and he is so sweet and amazing. We flirt, and act like we date most of the time when we aren't arguing over stupid stuff. Everytime I'm around him my heart melts and gets warm and he knows I like him and how much. He likes me but won't date me because he doesn't trust himself around me. He trusts himself to not to trust himself, he is basically scared he would hurt me. He says that one day he may just lose interest in me and he doesn't want that so it would be best not to date. No expectations and no ties but I want ties to him. I don't know what to do or say but I do want to still be around him.