life issues and a new boyfriend, unsupportive mother

Can't add much to what's been said, I agree with all the above. I guess depending on what sort of mummer you've got, perhaps a frank conversation letting her know that she's got to start accepting that this is who you are, otherwise it's bye-bye for now. Maybe after a bit she'll come to and realize, hey, I miss my son and what does his sexual orientation have to do with our relationship anyway? If not, well, tough and I guess you've gotta keep moving for the now. I guess, keep your options open and maybe she'll come around is all.

And yeah, I'd actually say discourage yourself from getting into a relationship. Seeing how you just went through the loss of a loved one, I sure there must be some issues you're sorting out, and issues which you and you alone must figure out. Friends are great, because you can think outloud with them, hang out and put everything aside for a bit and if you have a bunch, you can spread your emotional needs across them. But if you started dating s/o else, the relationships gonna be lopsided since you're going to be more high maintenance at first and need more from them, and this would put strain on it which could lead to potential collapse, and that would be more bad times.

Wait. Did I actually say anything new at all? Ah well...

Jam it back in, in the dark.