Just ask someone in your family to write a letter about your relationship from their point of view and to write it like any letter. For example, in our letters my mom wrote about when I first told her about my relationship with my common-law partner, the first time she met him, the things we all did together and with the rest of my family, how she's looking forward to us moving back to Canada and how happy she sees us being together, how she's willing to help support our relationship in any way she can etc. I think it's best if you have someone write it a bit more personal instead of just copying a format and having it be unoriginal and potentially sound fake. We had one of our friends also write a letter about when he first met us and how we have dinners with him and his girlfriend and how he's come over to our house and he wrote about how he sees us as a great couple who make each other laugh and enjoy certain hobbies together etc.
