Well, another year has passed. I just can't believe that it went so quickly. I've been studying for my exams and I finished high school. Now I start my studies in the College of Medicine
at medical college
and I really miss the times (that) we spent together. I am so sorry
because I didn't send letters for you.
that I didn't write to you. Actually, I lost your address and (I) was lucky to find it again.
And how are you? I hope that you and your family are all right. Did you join the Interior Design College as you always wished? I really want to know your latest news and know everything about your studies.
I'm writing to tell you that I have been to Europe and it was great. Do you believe that I met our friend Yara in France? It was by accident. She has been there for five years. She got married and (she-omit) is waiting for her baby now.
Well, that's all about me and we're all doing fine here. I hope to hear from you soon.
Your best friend
This is very good English. One suggestion: you repeat pronouns when it is not necessary eg She got married and she is waiting...
You will notice that I put 'I' in brackets in one sentence - it's not incorrect, but a native speaker would omit it.