My best advice for any college student (especially freshmen) is to explore, to figure out who you are by deconstructing who you think you are, and to have an intense passion for what you do. These four years can be lost in the mix of making others happy or they can be an enlightening experience for yourself.
As a business pro you are used to hearing the word "no." You can't escape rejection. But you can let it go. Fear of rejection is not a helpful emotion in business as it's not personal. Have confidence in your approach to business and your industry expertise. View every rejection as an opportunity and not as an attack on your personal character.
The first step to being fully alive is the recognition that you are the one holding yourself back. This is the cornerstone for all the other steps. When you get that at a deep level, you can decide your path to freedom. Whether it's therapy, a 12-step group or the support of good friends, use the resources that are available.