I feel like I'm not girlfriend material /vent

IDK.. I feel guilty for saying this about myself but its true. I look at women around me that are in a relationship, and I just feel like I wasn't made of the same "material" if it makes sense? I think I am a great friend, but when it comes to relationship I dont think Im "cut for the role" or wtv.

how do i feel better about myself lol :')