Hi, So recently, my roommate was planning to move out. He is M(27) while I am M(22). For context, this was a 2 bedroom apartment, with a living room and 2 bathrooms. Now, a few weeks ago, he wanted to move out as he had bought his own house. Usually, he is primarily the one who uses the kitchen, the living room, as he had rented this place way longer than I have. I am a student, and I have only come out to the living room about 1-2 times, in the entirety of living here for a year. I don't use the living room, or the kitchen that much. I usually keep to myself in my own room. Few days ago, he broke the news that he'd be moving out, and he'd wanted to co-pay for the cleaning services before he leaves. He'd wanted to split the service bill 50/50, cleaning the kitchen, living room, both rooms, and the bathrooms. (which was around 400$ for full deep cleaning) AITA for not wanting to split it 50/50, especially since I have not come out to the living room or have had used it at all, and he's the one who has left the condition to get this dirty?