Was my honesty rude?

A colleague told me he enjoys working with me ( and he wants to work with me on another project) but I told him that working with him would be difficult because of his other obligations!

I have worked with him previously and he did not finish work on time and I had to meet with him in after school hours to finish the project on time! I did not have a positive experience working with him!
Was my honesty rude?
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