My battery and alternator is fine but I have to jump my car each time to start

no they are not fine.if it wont start on its own,and you get a jump,and it starts,you need to have the charging system checked.also need to check all connections,need to be clean,tight,and all hooked up,including grounds.battery voltage with car off should be 12.6 volts.battery voltage with car running should be 13.5-14.5 volts.