I'm sorry OP but I have to be totally honest and give you some tough love. Reading this whole thread is so frustrating.
You're coming off as incredibly desperate.
You DO NOT need to go and collect your things. As previous posters have said, it costs less than £4 for them to post them to you. The only reason why you are insisting on going there yourself is because until then there is still a connection, and let's be honest you are still hoping he will see you and change his mind. You're clearly hoping he won't be out the house otherwise you wouldn't be so keen to go collect them yourself.
This is the man who was "too ill" to contact you, the same man who is still unwell and can't hear properly, yet when you were meant to collect your things today he had plans to be out the house? What was that, a sudden miraculous recovery? 
You keep saying things like "maybe if I hadn't been so keen it could've gone differently"....no!!! It doesn't matter what you did/didn't do, it would've turned out exactly the same! In fact he probably knew from the moment you met this would be his plan. He's probably done it before and he will certainly do it again.
He doesn't love you.
He doesn't respect you.
He doesn't want to speak to you
He doesn't want to see you
He doesn't want you contacting him
He doesn't want you at his house
He doesn't want you contacting his mother
I know you said you aren't desperate for a relationship and you don't need councelling but I'm sorry it really does sound like you do. It isn't healthy/normal to declare your love and talk about kids within a few days.....anyone else with any amount of self esteem would've done a runner from him there and then. The fact you found it so easy to go along with what he was saying and what he claimed he wanted instead of saying "wow mate slow down....bit weird" is huge signs you were desperate for that relationship. I can guarantee if you'd told him to slow down he would've ended things with you there and then, because you would've shown him you weren't a person who could be fooled by him. He didn't say all that because he meant it, he said all that to see if you'd fall for it and you did.
You sound like a lovely person and one day you will meet someone who respects you and treats you right.
But for the love of god you need to speak to someone about your self esteem. You are too obsessive in each and every one of your relationships. Accept when someone has ended the relationship, stop holding on to any form of attachment, stop dragging it out. Stop messaging him and his family. You do realise as nice as his mother is, she's probably only replying to be polite don't you? She has no other reason to contact you, you aren't his girlfriend and it isn't like you were in a long term relationship where she would now miss you.
You will continue to meet idiots like this and have "relationships" like this until you work on yourself.
Like I say you sound lovely. But you need to help yourself before hoping someone else will.