Why my exhusband asking some details and searching about me.tnx?

ive been separated for almost a yr.i dont have any contact to him anymore nocommunication at all.he even forgotour two sons.his a cheater and lier.he escape of his responsibility and i didnt force him anymore cause i really tired its like im begging.if u will suggest why i dont file for a child support because i dont know where he is exactly in states and im living in the philippines and here itsso hard to file if u dont havemoney.i only raising my kids alone.but still hurt until now i love him.the last time i talked to him he wants to comeback with me but i rejected him because the pain still here and now his living someone that he doesnt really love.my question is why he still searching us for what reason.i needur true opinion