Firstly, you have to recognise this feeling as your perception only. We generally tend to think that about many aspects of our lives - other have better jobs, better houses, better lives, etc. It's normal and human to feel that way, but you'll want to recognise where it is coming from.
In fact, it tends to be that the people who have the abilities tend to underestimate themselves more, than those with lesser abilities. In other words, we tend to put ourselves down more, because we set higher expectations for ourselves.
Setting higher goals for ourselves is a good thing! We just have to not let it discourage us from trying new things, and reaching those goals. Naturally, there would be dancers with more experience, who have been doing it for a longer period of time, and that's fine. We can actually use it to our advantage, and learn where we'd like to see ourselves in the future! It's the same with any activity - sports, life goals, family, etc.
Let this feeling be a force of good, and let it push you further to better your skill, and feel like you've achieved something! You'll be improving after each class, every dance, every interaction. Before you know it, you'll be looking at yourself and thinking - hey, I can do this!
