Remember that relationships require give and take
Is there anyone in your life who is taking advantage of your kindness? Do you give more than you receive from specific friends on a regular basis? It may be time to take a step back if you don't think the relationship can grow with your increased confidence.
A healthy relationship needs a certain degree of reciprocity. When one person is constantly giving and the other is always taking, it usually means that one person is sacrificing their own needs in order to ensure that the other person gets what they want. Even if you like pleasing people, it's important to keep in mind that they should be doing the same for you.