OK, I work with this guy, who I consider just a friend, and he has fallen for me, I am disgusted, how do I tell him to stop it; thecalls, texts, I miss you's, gifts, etc. I have told him we are only friends and he does not get it! There has not been any kissing or sex invloved

If you have tried everything then you need to give him an ultimatum,either he stop the harassment or you are taking it to management.
He sounds obsessive and that could become a danger to you.
You can't be nice to some people and he sounds like one of them.

This sounds dangerous. Break off the relationship you have with him now. Tell him to seriously stop it, if he doesn't then take it up with management and file harassment.

Block his number, don't take his calls, refuse the gifts, don't talk to him.

If he's that thick, be prepared to seek assistance in making it stop.

Don't wait too long.

Start by ignoring him. Don't even bother telling him that you're just friends. Pretend as though he doesn't even exists. The less attention you give him, the better. Unfortunately some people just can't take a hint and if you give him any sort of attention, he's going to have a sense of false hope.

If he still persists after a two weeks or so, you might need to threatening to report him to management. I would rush to report him, because it can cause a lot of tension in the office. So try to ignore him first.

He doesn't sound like a friend to me at all. Stop being friendly, accept no gifts, ignore calls and texts, and turn your head when you see him at work. If he still can't take the hint, tell him you will report him if he doesn't LEAVE YOU ALONE PERIOD!!