Stop keeping your heart’s desires locked away. (http://tinybuddha.com/blog/do-you-define-yourself-and-your-life-negatively/)
You only have one life. It is up to you what you do with your life. Will you let other people talk you out of your dreams with silly comments and rationalizations? Or will you follow your heart?
We demolish arguments and every pretension that sets itself up against the knowledge of God, and we take captive every thought to make it obedient to Christ. (2 Corinthians 10:5)
You should stop waiting till you are confident enough, pretty enough, tall enough, skinny enough to do the things that you want to do. Just do it.
Establish boundaries in your relationships. If people do not respect your boundaries, pray and ask for God’s wisdom on whether to continue the relationship or not.