Do I say something to boyfriend about his mother?

A little background, I have been with my boyfriend for a year and love him to death. We have talked about the future and plan on getting married. My problem is his mother. His family has always treated me nice and with respect and he says his mother likes me but I guess bc we're so different I find it really hard to talk about anything meaningful with her. She's like Martha Stewart, very judgmental, thinks her family is just picture perfect, won't cut the apron stings and I find her to be well phony. I live alone, he doesn't and I only go over there when I have to which is very rare since he stays over my apartment a lot. I never get a kiss goodbye or hello but a "take care". His grandmother whom him and his mother supposedly don't care for I get along with great and I really like her. I find it really easy to talk to her and find it rude how her own grandson basically ignores her when he goes to visit. Supposedly she made a "comment" years ago that offended beloved mommy and he takes her side in the matter. I even like the aunt better too. She's never said anything nasty or behaved rudely, she gives me food to take home but still. I made a comment once about her calling him often to him and some others and he asked me once if I don't like his mom or something and or course I said no I do. Last time we went to his house a few weeks back as we pulled in the garage I waved at her, it is dimly lit, but she was looking right at me and she didn't wave back. Now I don't know if she didn't see me or maybe thought her son didn't see her not wave. I didn't say anything to her or him about it. It kind of pissed me off and I can give her the benefit of the doubt that possibly she just didn't see me but I've considered saying something to him about it but don't know if he'll run back and tell her. I'm sure she will pretend like it didn't happen or she didn't see me. With the holidays coming and all do I say something or bite my tongue.