I feel so bad about myself

I feel so bad about myself that I'm embarrassed to look in the mirror.I don't know what to do anymore and I'm tired of going back to the vice again and again. I don't want to give up but it seems I'm still a slave to my sexual impulses and that makes me feel worse. I don't know what I'm doing. I tell myself day after day "I'm not going to do it" repeatedly and still I fall. I'm not asking for motivation... I just want to try to understand myself and I vent on a stupid Reddit group.Sorry if you had to read this, but sometimes I feel like I just want a little understanding that I don't give myself.