I tried to send you a PM, OP, but I couldn't - I hope you are still reading though
I just wanted to send all the support and high-fives in the world to you and your girlfriend. It's hard to be happy in this world, and hard to find someone who you really want to be with. Labels are made to help us, not to be boxes which control how we behave. You owe nothing to anybody but yourself, your girlfriend, and being the best partner you can.
I've had all sorts of ->-bleeped-<- in my time from similar people. Been called a traitor to womanhood for dating a cisman. Been bullied by other bisexuals for being the sort of bisexual who dates cismen instead of, you know, cool queer trans men or whatever. This stuff really affects you and mucks up your perception and impacts stuff.
For me it always felt a lot like when a guy sidles up to you on the bus, and you know he's hitting on you, but if you ask him to stop suddenly he denies all knowledge - but you *know* in your gut what he meant. So, people talking about the patriarchy in general terms and then implying that bisexual women dating men aren't really queer, and I'm sitting there thinking...hang on...but if I say anything they reply "oh, not you, but we were talking about how problematic it is on a societal level and as oppressed people we have the right to critique the cisheteropatriarchy because we can't possibly hurt anyone, we are so oppressed". You let it slide. Five minutes later, they're implying your boyfriend is a rapist, and you're not committed to LGBT rights because you won't sleep with them.
You get the idea.
None of those people are in my life any more.
And it never stops: I'm marginally more cool now, because I'm not dating a straight guy any more and I'm more out about my gender. But my new boyfriend - a cis, gay man - is too nervous to go to Pride with me because I don't pass and he doesn't want to put up with this bull->-bleeped-<-. He's not too nervous of getting, you know, shot or outed to his parents. He's nervous about that rejection by our queer fellows. He sends me nervous texts whenever I go to lgbt groups, because he's worried about me dumping him for someone more Radical.
Bad times.
Balls through it, friend. You can even use it as a litmus test. Anyone who gives you the slightest pushback, critique, or gut-feeling about your personal relationship is not the sort of person you want to hang around with.
Your relationship is chillin out in your pajamas, bringing cups of tea when each other are ill, surprise notes on the fridge and lending each other books. Your relationship is not a tool of the queer resistance, or an example of how problematic trans male politics can be, or any of that ->-bleeped-<-. Cut anyone out of your life who tries to use it as one. There are plenty of accepting people, find them. And I hate to say it, but often the people most accepting of this kind of thing are not necessarily people who are super super into lgbt politics. You'd hope that people who think a lot about gender/sexuality/fluidity would understand. I've found they can be far more dogmatic.