Probably a bad idea to leave your snake with someone else, even if he is your boyfriend, what if you guys break up? What will happen to the snake then? Does your boyfriend know how to care for a snake? Is he willing to constantly monitor temperatures and humidity to keep the snake healthy even when you are not around? What if one of your boyfriends buddies leaves the cage ajar and the snake escapes? It sounds like a iffy situation for the snake to live in, if you really care about Ivy than you should probably not leave her in that environment...
But I do have to disagree with some of the people saying snakes dont have emotions. I dont know about all of your snakes but mine talk to me all the time, they tell me to do terrible things... terrible things... They wont get out of my head! They constantly complain about the temperatures! It's either to warm or too cold! They harrass me incessantly about the humidity, it's too dry they say! And they drill into my brain with those hypnotically piercing eyes of theirs, I lose huge chunks of time and do not remember what happened, then I look down and realize that I just thawed out a half dozen frozen rats... My God! There can be only three possibilities, my snakes are somehow using their ESP to control and alter my thoughts, the CIA has secretly been experimenting on me using cutting edge mind control drugs, or im just totally out of my gourd...