Hello TG Dysphoria: I see this is your first Thread...so... welcome to PsychCentral! What follows is my perspective with regard to your questions... If you're really MtF transsexual... you're trans for life. It'll never go away. And, no. Marrying will not make it disappear. Many trans individuals have hoped for this over the years. But I don't know of anyone for whom it ever happened. Marrying will sometimes cause transsexual feelings to lessen for a period of time... maybe even for a number of years. But they always come back... often stronger than ever. And then, if children have come into the picture, the whole situation becomes even more complicated. I'm sorry if I sound negative. But I want to be honest with you. If you really are an MtF transsexual, this is your reality.
One question here, however, is are you really "transsexual"? In a sense, being truly transsexual is an extreme situation. Not everyone who has the feelings you do is transsexual. They may be "transgender". But transsexual & transgender are not necessarily the same thing. There are many resting places along the gender identity continuum. If you can, you might want to consider seeing a therapist who has experience working with persons who have gender identity concerns. Such a professional could help you to figure out where you really stand with regard to your gender identity. This is complicated stuff.
In terms of marrying, from my perspective, I think the important thing is to be up-front with any woman you become involved with regarding your gender identity issues. As TheSeamster wrote, many trans people marry & have supportive, loving partners. But this has the best chance of happening if you are open & honest from the start regarding your gender identity. It has certainly happened where a person hid their gender identity issues, sometimes for many years; and when they finally "came out", their spouses stayed with them anyway. But I would guess cases such as these are in the minority... and it is always a risk.
Anyway, I hope something I've written here has been helpful to you. I send warm thoughts your way with the hope that you may come to embrace your true self. (Feel free to Personal Message me, here on PC, if you want to correspond further with regard to this topic.)