Why would someone get upset with you for not accepting friendship when they know you like them romantically?

I have read many stories online about someone being rejected and put into friend zone because that person does not share the same romantic feelings towards them for whatever reason and then get upset if that person decides to break ties and communication with them and basically moving on with their lives? I have also had this happen to me with an ex who was my very first relationship it's a long story I don't want to get into it but long story short, he decided that I wasn't his "type" after knowing each other for nearly 10 years in that we weren't "compatible" in his words and decided that is best that we should just be friends and because I declined his offer, he proceeds to Gaslight me and call me selfish for not settling.

Which doesn't make sense that people will call it "selfish" for not wanting to be friends with someone that they want to date but then we'll get mad when they declined their offer to be friends I kind of find that to be very selfish and entitled to expect someone who you know like you more than a friend even though you do not share the same romantic feelings towards them to stick around as friends. What are your thoughts on this?

Granted I get that we all have preferences and just because someone likes you it does not mean that you are obligated to like them back as well. No one is obligated to settle for friendship with someone that they know that they are attracted to and want to date.
Why would someone get upset with you for not accepting friendship when they know you like them romantically?
Post Opinion