Small boyfriend problem, need advice? (10 points)?

[Pierre]

To start off, I'm a guy, if this helps. I've been going out with this guy for like, a week now. I found him on facebook. We go to different schools but live in the same city. Two days ago we met for the first time in person at the mall. We've been texting everyday, but 9 out of 10 times he takes at least 5 minutes to reply back. It's frustrating because it makes it hard to have a decent conversation with him. Today he isn't texting me back, and it's been 3 hours. He's working today, but one would think by now he would've gotten another break. I feel like if he really cared about me he wouldn't take so long to reply to my text. Since he does this so often I'm beginning to think maybe he's gotten tired of me already, or maybe he just lied to me about loving me. I'm really annoyed at this. At the same time, I can't help but wonder if I'm being too clingy or if I'm a little too much in love with him. What I'm asking is, is the problem here him, or am I being clingy?