<human>: Can you condense the text into three sentences or less?

First, let me preface this by saying that I am completely and totally for equality and support gay rights wholeheartedly. Secondly, I understand that a person cannot change who they have feelings for.

On to the post then. I spent three years with my ex in a monogamous relationship. A little less than a year ago, I was forced to move for work. Rather than force a long distance relationship (which we both had poor experiences with), we decided that it would be best if we waited until she graduated and then we could evaluate where we were at. We stayed extremely close friends. We would text and video chat almost every day.

Last week, I came back to my Alma mater to visit some of my friends. Obviously, I made plans with my ex to see her. Well, she dropped a bombshell on me. She is gay. Rather, she isn't sure what she is. She is currently dating a girl and has been for over six months. I asked her what this meant for us and she told me that she intended to stay with her current girlfriend indefinitely.

I am heartbroken. Not only was I certain that I was going to spend the rest of my life with this girl, I feel like our relationship has been completely devalued. The amount of time that it took her to find a new, serious partner is the part that hurts the most. 

I want her to be happy. I honestly do. I probably sound extremely selfish, but I am just confused and hurt. It's entirely okay that she is with a girl. I just prefer that she was with me. I feel blindsided and don't know where to go from here. I love her very much. How can I get over my feelings and be supportive to this wonderful woman?
<bot>: My ex went from heterosexual to a homosexual relationship. I am hurt by the length of time that it took her to get over our relationship. I would appreciate help in getting past that and being there for her.