I dont know what to do. Should I tell my best friend or not say anything? Please help?

[Jon Ryan]

Whats up. Im in the military. A few days ago, I found out that I was aexual meaning that I have no desire to have a sexual relationship with anyone. I know that im not gay. Im straight..I want to have a family, wife, and kids someday but knowing that I will never have that troubles me and sometimes gives me suicidal thoughts. I dont know what caused this but it has been bothering me lately. I cant even sleep. I dont have much of a family so I rely on relationships and friends that I meet around the world. It wasnt until I came to my first duty station that I met my best friend. Weve known each other for 8 months and have had many good times and some bad times but we relate to each other a lot. He has always said that I have a bad demeanor of coming off to people which is kind of hard to keep under wraps with this problem. I have been improving but I wish I could be more social and get people to like me more. Im paranoid and insecure with my personality even though people seem to like me. Heres the problem. He just went to afghanistan and it seems like since he left, i feel really alone with no one. I have many friends but everyone, men and women, have that one friend that cant compare to others. He really wants to know whats wrong with me and why im acting like a *****. Im afraid that if i tell him, that will ruin our friendship or whatever. He asked me to be his best man in which I said yes but i dont think i deserve it. I dont know why he asked me becuz weve known each other for 8 months. You usually ask someone to be your best man if they grew up with you or were a big influence. I dont know what to do. Please help! THanks