Re: who do I worry soooo much?
This feeling of "bad thoughts" you are referring to, do you mean bad as in, he's with another girl, or he's in an accident? If it's the latter, it's normal. The former, however, is more complicated:
Have you been cheated on by people or by him before? I know this feeling, and it's hard to rid if you cannot trust your partner.. and it's obvious that there *is* some doubt if this is the case.
If you don't already, talk to him about this trust issue. You never know, he might exhibit the same feelings as you. Remember that lateness is human nature.. especially for us guys. Don't make a big deal out of nothing. And this leads me to the following:
Don't overdo it! I've had this happen to me before, and I ultimately broke up with her because of it, because she just wouldn't stop bugging me everytime I was late. Even if it was just 5-10 minutes, she'd interrogate me to see if I were with some girl. It showed that underneath the blanket, she lacks trust, even after time and time again of my reassurance. It gets extremely irritating.
So have a long talk about it, learn to trust the guy. Without it, your relationship will not last in the long run anyway.