Hi and welcome. I'm a Licensed Master Social Worker with more than 20 years experience working with individuals and families on a variety of issues.I am sorry to hear of the loss of that freindship with A and it seems like you have moved on and healed from it and found a nice new friend. I understand your conern about B and C having an issue and C possibly ending a relationship with B over what seems small. Bear in mind that what may feel small to you may not in fact feel small to either of them. Does that mean it could happen with you and C? Maybe but that is always a possiblity with any friendship...that there could be a falling out. But you do have the ability to keep communication open between your friendships.You may also help C to find a way to repair what feels difficult rather than end a friendship but in the end it is between them. I would try as best you can to live your life with your friendships and leave the worry about what will be out of the equation.Get out there and continue to enjoy your time together and always communicate open and honestly so that things can be repaired rather than a tough ending.