If he’s fidgeting all the time and is constantly fixing his appearance, such as combing his fingers through his hair and fixing his shirt while talking to you, ask yourself if there is a reason for him to be nervous.
Probably the reason he’s like that is that he wants to tell you how he feels but something is stopping him from doing so.
He also wants to look his best for you, which kind of makes him nervous, because he’s afraid he could mess something up and lose the chance with you for good.
It’s a lot of pressure and we’ve all been there, so you can’t really blame the guy for stuttering and spilling his drinks from time to time.