when someone acts like a cool person until the have integrated theirself and their friends into your life, then start to engage in stalker activites, such as constantly trying to talk to you and bringing up unimportant things you previously said and begging you to love them. these are ticky to deal with as if you block them and try staying away from them they will use their friend connections to find you
guy 1: God i have an annoying stalker she just wont leave me alone!
guy 2: just block her
guy 1: i cant she's a sleeper stalker
guy 2: that sucks dude