Should i contact him after he stood me up?

Okay there's this guy I've been seeing for a few weeks. I met him through my sister's boyfriend. I really like his he seems like a nice decent guy. I've noticed he's a little shy but thats fine. Anyways we planned for me to come to his house at 10am this...

morning before I headed to work. I called to let him know I was on my way but he didn't answer. I didn't want to seem like I was breaking our plans so I still went to his house. When I got there I saw his car in the yard so I tooted the horn once. Then I dialed again to let him know I was there. No answer so I knocked he didn't come to the door. I was furious not to mention kinda crushed that he would do that. If he didn't want to see me thats all he had to say. So I came back home. This has been over 12 hours and he still hasn't called. I know he's okay because my sister's boyfriend has spoken to him. I want to talk to him to see why he did this but I don't want to seem desperate. I really like him. What should I do?

oh! I hate these situations. and I completely understand the part about feeling desperate. personally, I would wait for him to call me and if he doesn't after two days, I'd confront him about it. my problem is that I playfully bring it up, even when it's serious and then I get stepped on. dont be too harsh but you know. good luck!!