I've never had any issues with getting a girlfriend due to being trans. Before I get into any exclusive relationship with a female I always let them know and although they always have questions, they're mostly understanding. I've personally been exclusive with my partner for about two and a half years and she even identifies as straight. But I agree with all the other previous posters, the ability to have a relationship depends on your decision if you want one or not and then you have to put forth the effort to pursue a relationship.