It's a tough spot, for sure. I have been in the very same position and we followed a similar timeline. Ultimately, we did not end up as romantic partners, but I know for a fact, he will be my best friend until one of us leaves this earth and I'm grateful to have that in my life, even if it isn't in the way I had once hoped. I'm at peace with it now. I hope you can find a similar peace with your situation, but trust me when I say I know it just s*x!
Sorry about your mom. Hang in there and lean on your amazing friends!
Me 49, XH 51 3 adult daughters from his first marriage 3 grandsons, 1 granddaughter My 1st marriage, his 2nd BD 9/29/2014 H moved out 10/6/2014 H filed D 11/4/2014 D final 12/17/2014