I think you should let him decide what is best for him.

Being in a good relationship can help alleviate depression. Are you going to deny yourself a partner in life. That would be a pretty depressing way to live.

It's good that you're honest enough to recognize that you have a chronic emotional problem and to be concerned how it would affect a partner. But try raising the bar a bit on what you expect of yourself. Yes, for his sake you would have to try harder on those days that you don't feel like getting out if the bed, but challenge yourself to do just that.