i understand how this works sort of. ive been through this with my baby daddy(sperm donor) every few years he would show up or contact me and say the same old things i miss you i love you want to be with you and for awhile i allowed him back 10 years of this every cpl years business. but he always ended up screwing me over. once even to cheat and get another woman pregnant. i do advise to block him from your phone and remember what he has done that he is gone in the first place. over time it is easy to remember the good times and how things were but there was a reason gone guy is gone. it is healthy to not go back to something that isnt good for you. good luck stay strong