Tired of explaining……

How do you just walk away and keep your sanity? I’m tired of explaining what makes me upset. I’m tired of telling him how much I help him and getting nothing in return but lousy chit chat texts. He’ll suck me right back in the next day. I have never been this way. I’ve always been mostly secure. He’s no super prize. Hardly has friends from burning bridges. So why can’t I let this shit go?!!! Please no rude comments. He lives nearby so I’ll see him around. Do I just act casual like he’s a typical guy friend or act hurt like I truly am? When I explain that I’m upset he apologizes and not much changes. When I act casual, I feel like he’s getting away with it and nothing is bothering me. I hate this feeling of weakness.