My friend (F) is really close to her cousin (M). So much so that they not only live together but also work together at the family business. The cousin is a nice person but not really my 'type' friend-wise as he's quite grumpy and we don't have much in common so I find conversation with him quite boring. I meet up with my friend about once a month and the cousin asks if they can tag along every time. Would I be unreasonable to politely suggest that I don't want the cousin to join us every time? I wouldn't mind them joining sporadically but I find myself not wanting to meet up with my friend because the cousin is always there and I find him quite tedious. There is nothing wrong with the cousin but I just don't enjoy his company. I suspect I am not being unreasonable but I'm struggling with polite ways to communicate that I don't want the cousin there. Am I just being mean and for the sake of once a month, should I just put up with him? I will add that I'm sure the cousin has no idea of my true feelings towards him as I am always polite and engage in conversation. I don't want to damage my relationship with my friend or hurt the cousin's feelings as we live in a small village and bump into each other quite often.