i would go with the let him play with your breasts rather than trying to HOLD him and make him feed, that will probably put him off more.
this is why i found a sling helpful as mine liked to be carried, esp when tired and they would sometimes feed then but only in the sling.
i also did daft things like have playtime in bed with them, but not wear a top so you can be messing around doing rough and tumble play but they have access to your boobs, you may find he latches on when you least expect it, i remember being on all fours over one of mine, blowing raspberries on their belly and as i lifted up and away they grabbed a breast and latched on!
he really is veyr young to self wean and as he has just had an operation (what for if you dont mind me asking) then i would say it is maybe linked to that?
he wont have forgotten how to latch on, its an instinct that children grow out of, but he is too young to do that.
have you had him checked by a dr to make sure there is nothing else going on?
and also the heat may have a big part to play, mine simply didnt like cuddling up for feeds when it was really hot.
((fiona)) i know how upsetting it is, but try not to get upset and stressed as he will pick up on that xxx