Nope, the “attraction” comes from both of them being similar in that when they are together they boost each other negative traits, is part of why they can be such good friends at the start. One of Bojacks negative traits is having sex with women he has power over, so any “love” there was was one sided.
I would like to see Bojack getting out of jail and moving in with Mr peanut butter. Then maybe as they bounce of each other we can see how far they have come since the start. Bojack moves on to direct rather than act, maybe direct a movie with mr PB as the protag. Todd and the bunny girl relationship. Diane perhaps stablish a semi distance friendship with Bojack, I know they cut ties at the end of the show but is either him or Mr PB the only link to her left if they go to season 7 and Mr PB needs to move on maybe a new relationship. Perhaps an episode of PC taking care of her now a bit older daughter.