T.M.
I agree that counselling for your daughter is important, even if she says she doesn't want or need it. That is a lot of change in one year. Those would be big changes to deal with even one at a time, actually.
I think it's important to make your daughter a priority right now, if you haven't already, and make sure she knows it. This might mean asking your boyfriend to move out until your daughter is adjusted to your new situation. You probably have been unhappy for some time so feel you deserve you-time and to indulge, but try to refrain and hold off until your daughter can manage all these changes. Poor little thing didn't ask for any of this and is probably feeling like she doesn't matter to anyone anymore. Talk to her about it and make her understand that she is still #1 in your life, and also demonstrate that to her.
Good luck!