sometiems two people can be great together in a nonromantic way, and sometimes they dont realize that until they get into a romantic relationship. personally, as a person whos still kept in touch and still close friends with all my exes, i do it because i just feel like its a waste to throw away that relationship i had with them yk? not that im trying to salvage relationships, i just think that if our relationship doesnt work out romantically, then maybe its just better off if we were just friends? all of my exes were people who i were friends with first so yeah ik when to still keep in touch and be friends