Ever since I started reading books with romance in them, I was always "ewww gross" as a small child and skipped all the kissing scenes. That's mostly died down now, but sometimes I still skip past them because they're just. Too. Long.
When watching movies, I would always look away / cover my ears / hide under a blanket when there was any sort of sappy, romantic talk or kissing. My god. There is way too much kissing in TV. Now, I don't hide under the blanket, but I still get visibly uncomfortable when stuff like that comes on, and I fidget a lot and "go get water" so I don't have to watch it-
Whenever my friends talked about crushes, I would (and still do) get grossed out and uncomfortable. When I was younger, the train of thought was more of "ewww that's gross and why are they wasting all of their time on something stupid". Now, it's less of that (though I still do have those thoughts occasionally), and more of just, "Can they please stop talking about it?"