How to get over a fwb who wants to be friends?

I am having feelings for my fwb/friend and I feel like I am going crazy. He is acting like nothing has happened , but for some reason it is hard for me to be just friends. I feel jealous and want to spent time with him and think about him and I know it sounds childish. I just feel I need some time and space to get over him. Do I tell him that or i should just stop answering his texts. The truth is that i am afraid to close this door. I am afraid that he will never call if i cut him off and yet i dont want him to call me. ANy advices out there ?