Struggles in the playground? Any advice please?

Hello, I'm new to this site.  My son is six years old and in year 2 at school.  I've always known there's something different about my son, but couldn't put my finger on it until earlier this year, after watching Embarrassing Bodies on tv.  My husband and I did a quick questionaire online about Dyspraxia and it came out that my son probably has got that, but seemed to point also to Aspergers.  I did a lot of reading up online and I am positive he has Aspergers.  He is progessing well with his reading and maths (much higher than average for maths), but unable to write stories (cannot think of ideas) or draw pictures (his pictures are missing detail and are equivalent of around a 3 year old).  He seems to struggle with the imagination and social side of things (including routine changes too).

We are on the list for a Community Paediatrician appointment but I have been told that it's a very long list and could take a long time for an official diagnosis, so I'm doing all I can to help my son now.  

He is happy in the classroom but he is struggling during playtimes (the unstructured parts of the day).  He doesn't like sport so can't join in football, and the other boys play make believe games that he struggles to join in with, and they also won't let him join in.  He comes home most days saying he had been crying during lunchtimes because he wasn't allowed to join in.  Party invites have stopped arriving and I'm becoming increasingly concerned about him as I don't want him to become depressed and not want to go to school.  When we saw the Occupational Therapist (1st appointment for Dyspraxia possibility), she asked him if he had many friends and he said no not really, no one wants to play with me.  I felt completely heartbroken for him.

If anyone knows any advice or tips I can help him with, or any kids clubs in the South West (Bristol and Weston-Super-Mare area), I would be really grateful.