Guy problems ? just venting

Soo there's this guy I've been talking to for awhile I like him but at the same time I don't ? Is that weird it's just sometimes I don't even want to be bothered with him but other times I do and when we first started talking I liked everything about him now I'm just not interested in him as a boyfriend but he likes me in that way and its little things I do that's mean like when he try's to kiss me I don't want to kiss him at all I don't even like him sometimes I just feel horrible about it when we have sex sometimes afterwards I feel gross but idk why I just feel terrible but I still want him in my life as a friend :( nothing more but everytime I bring it up he gets angry I just don't understand why I feel this way toward  him ?