Achieving any goal could be somewhat difficult within this friendship. Your chum will see you as the dreamer, and your carefree attitude and seeming refusal to get serious might drive them crazy. But their overly serious, even pessimistic outlook will drag you down and switch off your creativity like a light.
You'll find it really hard to view each other in a positive light, which means you won't appreciate each other's strengths. You won't get why your pal does things the way they do. You'll wonder why they're so serious all the time, so uninspired in their outlook, and they'll wonder why you seem to love chaos. And both of those views will be both incorrect and unfair. If you could both just start seeing the benefits of your buddy's way of doing things, you might be able to blend your strengths and make a really formidable team.