Is what it says on the tin.
For just a very short background bit... I've not ended on good terms with some of the people I've been with in the past, and nowadays I find them physically so disgusting that I can't imagine why I ever hit that. In one case this is partly because the guy gained a lot of weight (I'm all for fat-acceptance, but he really carries it badly) and ended up looking literally like a pig. But in other cases, they still look the same, but I find them gross. Does anyone relate?
And how serious you were in these relationships?