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It is difficult to tell what impact applying together will have. However, even if the two of you are called to the booth together (unlikely), your individual applications will be assessed separately.
I once applied with a relative. We were at the booth together but the consular interviewed us both one after the other. Then she told us that I was successful while my relative was not.
Unless your application is particularly strong, I would not risk applying together. Listing him as a travel buddy isn't really going to be an issue.