Does this make me selfish?

Every year my SO goes to Dragon Con as a Christmas present from his family. It’s his one time a year that he goes off and hangs out with friends and drinks as much as he wants for like 5/6 days. We are expecting a baby in June near the middle/end. He or she will only be about 2 1/2 months when next year’s Dragon Con is happening. I would like for him not to go next year because that would leave me at home with the baby to take care of and work at the same time, is it selfish of me to not want him to go next year, even though he’s adamant on going? This would be the first one that he would miss in 5 years.