Sleeping on thier own

  So since Nathaniel has hit the six month mark I thought it is time to try to get him to sleep on his own.  How you ask I have no idea.  I am one of those parents that doesnt believe in letting your child cry to sleep, it breaks my heart and in my opinion seems kinda cruel.. I have tried to let him cry for a bit then go into his room let him know i was there and try to calm him down and do it all again ... and no go ..    The only way he will sleep is by rocking him to sleep and/or feeding him where he falls asleep while eating.   I know I need to get away from that and its sooo hard.   I am starting to think that its not going to happen which is very frustrating.  There must be another way to do it