Is this email written correctly (Thank you in advance)

Dear Sussan,

Thank you so much for your kind message. I am very glad that you remembered me and invited me for the family reunion.

I am very sorry to inform you that since the visa process is a very long process and it takes almost 2 to 3 months I am afraid that I can not make it this time. However, I would really like to visit you in U.S. So If you can send me the invitation for visiting a family then I will apply for the visa and can come and visit you and the rest of our family in the future. Can you also add the name of my girlfriend to your invitation. Because I would like to come with her if we can get the U.S visa.

Please give my regards to everyone in our family who are coming for family reunion end of August and please apologize to them on my behalf.