As reported by AP, she also received five years of probation.
Overall, Moniz issued a 2.5-year term but said the defendant should serve only 15 months at the Bristol County House of Correction.
Moniz said it had been important to balance punishment and rehabilitation for her role in the death of Conrad Roy, 18, who died from carbon monoxide poisoning in his pickup truck in July 2014.
One of Carter's more straightforward text messages to Roy urging him to end his life was used as evidence in the case. "I mean you have to do it with any new piece of equipment, you're not going to give a person a vehicle and the keys and just say see ya later", said Nelson. You said you were gonna do it.
Conrad Roy Jr., Roy's father, called his son his "best friend" and "first mate". No more pain. It's OK to be scared and it's normal. "You did something wrong, but on the other hand I understand you were a troubled teen yourself and this is going to scar you for the rest of your life".
The judge focused his ruling on the chilling detail of Carter telling Roy to "get back in" to the truck filled with carbon monoxide after he climbed out and told her he was afraid.
The sentencing will be announced on Thursday after she was found guilty in June.
Moniz continued with his reasoning for the guilty verdict. Where was her humanity?
"After the sentencing, friends of the Roy family expressed displeasure with the decision, with one calling it an "[expletive] joke".
Carter wiped away tears as she listened to the victim impact statements.
The request of Roy's aunt for sentencing Carter for 20 years will be heard by the judge on Thursday.
But Roy's lawyers and family argued Carter hadn't shown remorse for her actions and deserved to be punished.
In handing down his sentence, he cited that Carter was a juvenile at the time of the crime. Celexa is prescribed to treat depression that can have side effects, including irrational thinking, irritability and poor impulse control. Within the messages, Michelle Carter knew her boyfriend was suicidal and told him that she wanted him to kill himself.
"I am confident Michelle will be vindicated because I do not believe a law was broken and her words alone are not sufficient to establish a manslaughter", Cataldo said.
Moniz issued the probation rules, saying Carter was not to have contact with Roy family, witnesses or leave the state. "And just go in a quiet parking lot or something", Carter told her boyfriend.
"There's nothing else I can do for him", she said.