I totally agree. Just like you, mine was over 9 years. 9+ long years I invested my time in this girl that I liked. And I thought she could be the one for me. But then, she hooked up with two guys during those times. She asked me for advice when she broke up. I was totally annoyed. And then she hooked up with the third one and I quickly made the last decision. I ended this relationships with her because I can't be stuffed going through all those things if she breaks up again.
What a waste of time. So to OP, don't go there. E-relationships will not work. I guarantee it.