I won't try to downplay the concerns you have. I think they are very legitimate ones. It's going to be much harder to find a willing mate when you project an appearance which raises questions in her mind. That's not to say there aren't women who would not be concerned, or even welcome a man having breasts. I think you would increase your chances of finding a girl who is okay with you depending on where in the country you live. Big cities on either coast of the U.S. come to mind.
Through ignorance, mainly, I denied myself the joy of having breasts until after I had found a mate and earned her trust over a long marriage. At this point, my having noticeable breasts is not an issue for her. But, even that is not a given in a married relationship as you well know.
My question to you is how do you know you are not TG? I was convinced early on that my feminine side played a small part in my overall identity, but after 'fertilizing' my brain with miroestrol from PM, it grew to reveal my true transgender nature. Be respectful of that possibility, dear.
Hugs,
Clara