Try to ask these unhappy people directly but with sensitivity about what's bothering them and determine if you could somehow be of any assistance to them.
You can fix unhappy relationships. The first step is to identify the source of unhappiness. The most important thing to remember is that communication is the key to fix the relationship. Each party must understand and communicate concerns.
You need to be very kind and tell them your true feelings.Be sure to emphasize you value the friendship very much.You can have dinners with them and talk more.
