You may want to consult a few more Realtors about the market value of your home. Most of the guesses must be on the same playing court.
Your friend may be more honest with you about the value of your home, and the other Realtor may have given you a higher figure because they already know what to expect. This is called “Listing Purchase” and is the subject of an article on our website.
Or your friend may be a good friend but not a very good real estate agent.
Mixing business and friendships is always risky for friendship. On the other hand, if your friend is truly competent and gives wise advice, they may be offended if you ignore the advice and choose another representative.