Please correct

Once she came to our house, the boys (<--"Boy's" with an apostrophe is singular possessive, meaning "the item that belongs to the boy." The plural form of "boy" is "boys" with no apostrophe.) got a wonderful, lovely friend he that they can have around all days long, just like he'd they'd always wished for a friend. They managed to do so many things (<--Try to avoid using "thing" as much as possible; it's a very childish word.) much together: read books, play piano, and so on; and of course, they brushed their teeth and go went to bed every night at the same time. Our family is very grateful to her for sharing those days with us and reminding us all of the very most important things matters of our lives.

Nicely written, Olga. I hope my corrections and notes are helpful and accurate. Please let me know if you have any questions or are confused. Thank you.