Dearest Beauty, Know that you are not alone in the dilemma to find true love whether cis, trans, bi or whatever color the rainbow has painted. Yes, there are many t-women out there who are happily married and have perfectly normal lives (whatever that definition may be). I state this because I know some of them and I, too, am one of those. Yes, there a great number of t-women who also cannot find that 'right' longterm partner but I think it eventually happens; yes, I am an optimist.
My ex and I were married for 16 years and that does not count the three years we dated beforehand. I am now going on 17 years with my second husband -and last- and I can state with all my mindspiritheart that he is the love of my life and I his. We've raised a son together (his from a previous marriage and still a baby when we met) and each day I am so very grateful he and I met by accident. Yes, he made me a Mother and I thank him for giving me that joyandpain. Love does exist and the long term relationships that go along as well.
All I can tell anyone is that it is a commitment and there is give and take and compromises along the way. But if you truly love the person -- it's a joyous piece of cake.
By the way, I am pre-op and all my other married tfriends are post. I know he would stand by me no matter what, come what may :-) and continues to be there for me when I am faced with challenges that shake my very existence.