Ferrell made the big announcement on Instagram Monday, posting adorable photos of a snowboarding trip the couple took to San Juan National Forest in Pagosa Springs, CO, over New Year's weekend.
"And on the last day of vacation this happened!" Ferrell, 29, captioned a photo of Vanloo on bended knee. "I can't wait to marry my best friend. Over the moon happy right now!"
While on vacation, Ferrell and Vanloo also went tubing and snowshoeing. The pediatric nurse called Vanloo her "favorite snow bunny" and the scene in general a "winter wonderland."
Ferrell had a highly-publicized and criticized relationship with Galavis following the finale of his The Bachelor edition in March 2014, which featured an anti-climactic ending in which Galavis told Ferrell, "I like you," and offered her nothing but his final rose.
After appearing on VH1's Couples Therapy,Ferrell and the former pro soccer player split in October 2014. Reports circulated at the time Galavis couldn't communicate his feelings for Ferrell and allegedly used her for the fame of their celebrity pairing.
"I knew I was never going to be the No. 1 priority, like, he has a daughter. But I mean, there's a difference between being the second priority and the seventh priority. We're just different people and... we just never saw eye to eye on [things]," Ferrell told Chris Harrison back in January 2015.
"It's not from a lack of trying on either side. I tried really hard and he tried hard too... It's just, I'm a nurse in Kansas City and he lives in Miami, and he's in the entertainment industry, and that's his job and that's his lifestyle. It was just really hard for me to fit into that... I feel like I was comfortable with expressing my feelings and he wasn't."
Many The Bachelor viewers despised Galavis during his season for how he treated the women, and those negative opinions spilled onto Ferrell for choosing to be with him despite those obvious flaws.
"No one prepares you for what's going to happen on the show and being in the spotlight... I wanted everyone [to] be happy for me, and I felt like [our situation] was misunderstood for a lot of reasons... the hurtful things that people said to me, it's just no one can prepare you for that," Ferrell added in interview with Harrison.