My best friend just told me that he wants to work on our relationship he also told me he wants to take things very slow. That he doesn't want to rush things, we hold hands, cuddle, hug, and we have sex, we dated 4 years ago but we had a good relationship it was just the finical part that was killing us now we both have a steady income we want to rebuild our romanace of the relationship.. What I want to know is, is he serious or is he just using me for the sex and the company and just as a friend with no intentions of becoming a couple again?

There is no way we can know this. How do you feel? Do you feel that maybe he is doing this or maybe he's serious? You would know better than us.

In any relationship, whether personal or professional, you must have a solid foundation of honesty, trust, and communication. The cement that holds it all together is integrity. You both must open lines of communication and discuss freely, without getting aggravated, raising voices, blaming one another, or name calling. If either are unable or unwilling to communicate, the foundation crumbles, and cannot be built upon.

What has me wondering is why you think total strangers can possibly know what he is thinking.
If you don't know this yourself through good communication with him, then I would suggest that you not get deeply involved, just until you have gained more maturity.