It’s very common to see trans people feel they are lucky to be with someone who tolerates them and for some this may be very true. For example if you have pushed the envelope into transition after not announcing you were trans from the outset, you should consider yourself very fortunate.
Conversely I think some set themselves up to get only what they think they deserve. What do I mean by this? That our natural self destructiveness conspires to set the bar very low and some of us are prone to settle for someone who is at best not repulsed by the idea that we are transgender. This is not exactly an earth-shattering gold standard.
Yes we represent a needle in a haystack but if we exist then so do they and I am certain that there is statistically a larger group of women who would welcome a transgender partner than our actual percentage in society.
Setting the bar low from the outset will only ensure that both of you will suffer should you realize later into the relationship that you want a freer range of expression than she is prepared to accept. I understand this is hard for people already in existing relationships but for those open to engaging in something new, here is your chance to be who you really are.
Take the time while you are alone to really understand yourself and, once there, be open to possibilities without bending one inch of your identity.