[hmmmm
I read the original Text quite differently.
(i) Funny, after your text, only now are things settling in
Implies has spent time playing around in his mind and the reality of decision is only just hitting home.... He is not happy about the outcome
(ii) But i suppose we made our beds so its best to lie in them
Is based on the commonly used idiom ""You've made your bed (and you'll have to lie in it)""and basically is something that you say in order to tell someone that they must accept that they will suffer as a result of something bad that they have done
Now I don'tknow if he is aware of the true meaning of the afore mentioned idiom, but thats what it means
(iii) Look after mum please
One would naturally have to assume that he is talking about his mother, and with this in mind, the fact that he has asked you to look after her would suggest/indicate/threat some form of self harm. Now needless to say I rather hope that this is not the case, it is however my initial reaction.