This is a tough call, honestly. I mean, I don't think you're be embarrassing yourself, but I don't know how he'd react to it. I know, I, myself would ADORE getting something like that? Maybe you could just change the address? I'm KIDDING! But, go for it. Girls don't show enough affection to boys who tend to become distant. Especially if he's an Aspie (I didn't see where you said if he was or not, but it kind of sounds like that.) Ultimately, it's your call.