Dear Ann,
I'm writing because I want apologise that I haven't written for so long and thank for the invitation o your birthday.
Unfortunately, our plans has changed and I have to come to you by bus not by car because our car had fixed and my father is sick so he can't bring me. I will be pleasure if you will take away me from railway station. In case if you can't arrived at railway station, please describe me once again the way to your house, because I am not sure that I don't forget it.
I hope that next day after to your birthday we have got more leisure time and we go to shopping. Moreover, I would like to ask you abot a gift for you. Mabye you have something special wishes? I'm really happy that we meet as soon, because we haven't seen for so long.
I'm looking forward to hearing form you.
Best wishes,
XYZ.