I've been thinking of sending her a card to at least let her know I love her - I no longer have the anger I used to have. I just can't have her in my life so this may have to do. It will be hard to fight off the onslaught when she thinks I've opened the door and all boundaries are gone in her eyes. Still think it's worth a shot
Only you can decide what's best for you. That being said: I hear you say that you love your mother, and would want her to know you love her.
If you sent her a card, would it make you feel better about yourself and the relationship? Would that make you feel better in general? I suspect it would, and that's why you are thinking about it.
My next question to you would be: compared to the past - are you stronger now? Do you feel like you will be able to "fight off" her push to move things into the old r/s patterns?