He's your ex-partner < br>...

Neptune (You) and Uranus had been a couple but they broke up due to personal issues and now you had another couple who was Venus... unfortunately, since the mansion of the solar system was in order of orbit, you had to share a room with Uranus because they were the last planets and now you were wearing just a long t-shirt that covered your shorts so anyone would think that you had a simple t-shirt