Good to see you're not doing this alone anymore. A burden shared is a burden lessened. But don't let it get too much to your head. People will be people, most can be ignored :)
Now for my personal opinion on this, yes, it was short, but it was sweet and I think complete for what it was. The art is great, the story is a familiar one, clearly, but one with potential.
Keep up the good work! And as others have already said, try to let go of the criticism a bit, focus on constructive feedback!