I think it's great that you're aware of how you can be, most people can't see themselves for their own stink; every single person reading this has been guilty of it at one time or another... it's called pride and it kicks our asses!
There are many scholastic, dogmatic and technical approaches that can be taken to addressing this topic, but I think the most practical approach is the simplicity of meditation. It is our selfishness that prevents us from meditating, it's our selfishness that prevents us from experiencing things because we are focused inwards. Meditation is one of the greatest tools in resolving this. How many people here can sit down to meditate and instantly find stillness in their minds and hearts? Even those who have mastered meditation know that there are days when they have to go back to cleaning out the old emotion closet.
Here is how I use the tool in a larger scope, this is one way you can get deeper and start to resolve some of the issues within.
First lets explore 'why' we are introverted. It all goes back to our desires and attachments. If you had no desire and no attachments you would be perfectly happy to sit peacefully and bask in the radiance of the universe. Desire its self leads to things like a feeling of entitlement, we then become attached to ideas and wants; many times we don't even realize that these things are inside of us.
Now that we understand where these things come from, let's establish some mechanisms to help us pinpoint our issues. I have 2 suggestions. 1st, pay attention to where you mind goes when you meditate! Often times you'll see patterns in the things you fall back to, observe yourself and make notes... in time this will lead you to the root which is always desire. 2nd, we speak our attachments! Listen to yourself and contemplate on the things that come from your mouth. You can also use this tool with other people; if you want to know what's in someones heart just be quiet and let them speak... they will show you everything that they are attached to.
If you are able to see these things in yourself then you are most likely capable of letting them go. This can be hard in some situations because we desire resolution and feel entitled to a particular outcome. These are things that only bind us though, it is the weight of judgement that makes our heart heavy. If I have an issue that I absolutely cannot find resolve for, I do a little ceremony to let it go. For instance, perhaps I place the problem on paper in writing, then meditate and in my meditation I go to a place of light where I can give this thing up. Then in the future, if my mind goes back to this issue I simply recall the meditative state of my ceremony and tap into the peace I had. Do this a couple of times and the issue will go away... it works wonderfully!
This very issue is of the highest importance from an Internal Alchemy perspective because it is the key to being child like! A child does not see the world with predefined expectations as adults do; they are able to observe the great mystery and experience it in greater truth. If you want to attain things like the secret of the golden flower, you have to be a vessel capable of having peace and balance within; to find that place where the universe can reveal its self to you. Everything will be given to you if you are open to receive it, but you are not open if you already have a preconceived idea. You're certainly not open if you can't stop thinking about yourself and your own problems. In the end we can come to a place where we have no concern for ourselves and the Tao is expressed in our very essence
