Moving out

Ne
Hey!
I'd like to ask you guys... So... My boyfriend and I would like to move together next year, in September. I have a scholarship that pays absolutely everything and he has a well-paid job so money wouldn't be an issue. The problem is that my parents would feel awful. I don't think they'd be against it, but... I'm 18 and I'm still a child to them and even though I want to live with my boyfriend, I don't want to because that'd be leaving my parents alone, and I know how they would feel. They joke about it but the truth is that they'd feel lonely without me and I'm basically the only reason why they live. They don't have nice jobs they like or hobbies. They only have me and themselves. Me leaving would break their hearts... 
Any advice?