confounded relationship

Ups and downs, highs and lows. Still taking stock and still trying to figure things out. I plan on asking S to come over this weekend, specifically after work on Friday. I can't help but feel that I am going to most likely get a no on that. I haven't specifically asked for him to come over on a weekend, I have however mentioned him coming by after work but not a specific date. I guess part of me feeling that way has to do with the email i sent him last week suggesting we he come by after work - being flirtatious i guess and he never responded or acknowledged that he even got the email. Its beginning to feel - to me somewhat humiliating asking and or putting myself out there like that only to get shot down or ignored. I despair of getting him to understand how it feels to put yoruself out there only to be rejected.

Is asking to come by after work on a weekend asking too much or being unreasonable. For a relationship that basically is set where we can only see each other on the weekends because of work schedules evenings vs days is asking specifically being too demanding. He was sick this past weekend and so didnt come by and I was redoing my hair so we didnt see each other. Is expecting to definitely see him this coming weekend being inflexible? there is this thing in his "household" where he is expected to help his mother with groceries when she goes shopping on saturdays and this usually is around late afternoon - so if i ask him to come by after work on a friday and stay till saturday its either he has to leave early saturday afternoon or he's not there and thats an issue.

This is something that has been an issue since we first met however I must explain and say that when we first met he came by all the time. almost every single weekend. sometimes during the week. Discussions on this topic of late have centered around his feeling the need to be available at home for his mother.

I feel like im in a losing battle sometimes. I don't want to press him or put him into situations where he feels like he has to choose between helpign her or being with me but i feel like the situation makes it that way.

Its been 18 months....and i just don't know what to do anymore.