The couple had been spotted regularly, and earlier this year, they were photographedsharing kisses in public.
The source claims the split was amicable. In fact, the relationship may even resume at a later date.
In the meantime, Stewart has been seen with Miley Cyrus’s ex, Stella Maxwell.
Last April, Stewart candidly discussed her sexuality with Nylon magazine:
Google me, I’m not hiding… If you feel like you really want to define yourself, and you have the ability to articulate those parameters and that in itself defines you, then do it. But I am an actress, man. I live in the fucking ambiguity of this life and I love it. I don’t feel like it would be true for me to be like, ‘I’m coming out!’ No, I do a job. Until I decide that I’m starting a foundation or that I have some perspective or opinion that other people should be receiving…I don’t. I’m just a kid making movies… I think in three or four years, there are going to be a whole lot more people who don’t think it’s necessary to figure out if you’re gay or straight. It’s like, just do your thing.”