Lack of reciprocation in conversation ? Maybe they are put off by the way you said something to them ? There could be a multitude of reasons...When they disappear on you, are you referring to the internet ? Or does this happen outside of the internet ? If its on the internet, you cant really blame anyone, how much can you TRULY understand about a person thru text ? There are no undertones to be heard because you cant hear their voice...There is no body language to be seen because you havent met them in person (again referring to internet dialogue etc)...Unless people wanna pretend like they are writing a book to someone online, dont expect anything more or less than what youve been getting , in my opinion.