Question

how to write friendly letter format

Answer 1

dear.....

1st para.....(telling how are you)

2nd para(telling matter)

3rd para(concluding)
                                                                    
                                                                     lovingly..
                                                                           name:
                                                                             sd/-

Answer 2

ur address in 3-4lines.

date

dear (name of frnd),
1st para...introduce the topic
2nd para..go in detail
3rd para....conclude saying will meet soon kind of stuff

Yours loving
(ur name)