Spicy food is my favorite! I love some chillies.
I also love spicy food! Esp. Thai food and Mexican 
A spice can be anything that adds flavor or coloring for example like a fruit, bark or plants!
I love spices, but I don't know how to integrate them well with my meals
There is so many ways to incorporate spices in meals. Mexican and Thai cuisine are the ones heavily focused on spices. I like Filipino too which is a mix of Indian, Chinese, Spanish and American cuisines. You can combine them in a fun way!
What are your favorite spices to use? 
I like curry myself. It's a mix of spices like herbs and chillies and can be made into a curry dishes of various kinds. What about yours?