Kylie Jenner and Timothée Chalamet are still going strong, and if you want proof here they are at a Knicks game a few nights ago, during which Timmy manspreaded next to Tina Fey to make room for his collection of drinks: Sarah Stier // Getty Images Anyway! Point is Kylie and Timmy are very much together, but apparently they aren’t rushing into marriage because Kylie’s worried it’ll change the dynamic of their relationship. “Timothée has talked proposing to Kylie, but she doesn't want to get married, at least not yet,” a Daily Mail source says. “She told him when couples get married things usually start to go downhill. He's been seeking advice from her mom Kris [Jenner] and sister Kendall [Jenner] about how he can get her to change her mind.” Another insider adds that the couple “are currently enjoying the life they have made for each other” and “He's still able to film and be away and she can be a mom and do her thing.…