Jenny, Hi! Welcome back! I must agree with everything you said, both about Mother's Day and how disappointing it can be at this time. Last year, at this time, I was separated from h. He did not buy me a card. He did take me out to dinner at daughter's insistence. It was painful. I thought "Why bother? I won't be able to eat anything, anyway." But we went, and survived. I cried all night when he left for his rented room.
I recommend keeping very busy with yourselves or your kids, or other friends. But don't obsess on the day. Also, all Jenny's suggestions on what to do and what not to do are very good ones. And remember, nothing happens quickly. Lasting change takes a lot of time. Be patient. Be very, very patient.