When your boyfriend tells his friend that he loves them too, but not as much as he loves you, it generally means that he values his friendship with that person and cares about them, but his romantic love for you takes precedence. This statement suggests that you hold a special place in his heart, and his feelings for you are deeper and more significant than those he has for his friend.
People can love their friends and romantic partners differently. Romantic love often involves a deeper emotional connection, physical attraction, and a desire for a long-term committed relationship. On the other hand, love between friends may involve care, support, and a strong bond, but it typically doesn't have the same romantic and passionate elements found in a romantic relationship.
So, when your boyfriend says he loves his friend too but not as much as he loves you, it could be an affirmation of the strength of his feelings for you. It's essential to communicate openly with your partner about your emotions and any concerns you might have. Healthy communication is key to understanding each other's feelings and maintaining a strong and trusting relationship.