<human>: I know this is a common theme but I want a different perspective of how to approach this.

I've spent most of the day writing what I want to tell him, deleting the whole thing, trying again, deleting, repeat...

The branches from this issue have been brought up many times before, I'm not sure if he sees how the little problems as being from the same tree of mom-ness.
I know that sometimes he feels that he's not a good boyfriend when I'm upset, so I don't want to list the things he does/doesn't do that makes me feel like more of a mom than a partner but I don't know how to make the point clear without those.
Is it too harsh to bring those up or is it necessary?

I feel like an unappreciated mother when what I really need is a supportive partner. I don't see a future with him if things stay the way they are but I don't want to put that pressure on him yet and make it seem like I have no hope.
On top of that, he has a big project due this weekend and he has plans with friends tonight. He already cancelled plans he was looking forward to a few days ago because of last minute work and I don't want to bring this one down too. But the air has been tense all day.

Give me a shortened version of the text
<bot>: I feel more like a mom than a partner and it's building resentment. Unsure of how to express this in a constructive way.