And don't forget: you are not a burden, this is what friends and family are for: to help each other if one is in a bad situation of life.
(why could I not help you in concrete, and only write more or less good advices?????)
Hope the crutches will help you ;-)
A little light in the dark:
it's good that you are in Thailand; when I had to walk with crutches, it was December (1993 I guess) and a real hard winter... The streets were icy and full of snow and I falled three times on my back(!) because the pavement was so slippery; not very helpful in your actual situation but... :-)