You have a knack for interpersonal conversation and facial expressions, but without some sort of surprise or punchline they feel chort and without purpose. If you string together several scenes (like those first 2 or 3 at that party) with some more attention to backgrounds (shadows give them depth) you'll have something of a "slice of life" cartoon. I think a longer project would really help you improve.
Thank you for your advice. I'm not sure how to go about doing shadows... As for the length of these cartoons, I do have a few scripted that could be stringed together... But ... I have a tendency to not stop working on something until it's done... That's one of the reasons why these are so short, I stay up for 6-10 hours working already, if they were longer, say like 2 minutes... It would take a lot more time...
The joke itself is kinda fun. The animation isn't that good and the texture quality isn't that good either. Maybe try using less bright colours and use shadows. If you're going to have voiceacting please use decent microphones.