Hi mooncat, welcome to PC and first of all I'm sorry for the loss of your mom, and it's completely understandable if it's still effecting you to this day, grieving doesn't come with a timeline
Really good idea to start seeing a therapist though, while meds can sometimes help, meds and therapy together can be much more beneficial.
But as for your boyfriend.........well it sounds like he's actually making things even worse for you.........to me he sounds really insensitive, and what you need now is understanding and support, right?? When you say you love him, could that be moreso you love the person he was before, when he did seem to "get it"?? Because who he is now.......well you deserve way more than what he's giving you. I'd say it was time for you to give up on him.
And there are going to be more supportive people out there...........hey, even keep hanging out on here, you'll certainly find some here!!
But give yourself time as well and work through things at your own pace. It's OK to still feel "sad" about your mom, it's OK if you can't just "shake off" the depression, in fact that's "normal".........what is important is that you are on the right track, you are reaching out for help/support. You can get there, without him.

Alison