Summer flings often start on vacations and end when the other person has to go home, and tend to be of the "short and sweet" variety. Kittenfishing is basically a version of this, but focuses on their younger, prettier self. A friendlier—if still frustrating— type of ghosting. However, it soon becomes clear that this person has no intention of following through with anything they've said. Yes, arguably, they're pretty similar.
Breadcrumbing is the latest dating buzzword.
The Dating Glossary
It implies a certain looseness of arrangement. People just noticed that the eggplant emoji was phallic-looking. If you're getting submarined, pro tip: First, they stop being as responsive to texts or calls, then they may cancel plans and be unwilling to arrange new ones.