"They tried moving in together and supporting each other at different events, ultimately they just weren't compatible", the source continued. News in a joint statement.
Nick and Vanessa add that this breakup was not an easy decision, but they say they still have a lot of love and admiration for one another and will continue to be there for one another.
But it's possible the relationship was over a while ago.
Nick even admitted on The Bachelor that the combination of their personalities could be a match made in heaven or a total disaster because they'd butt heads frequently.
"Nick and Vanessa have wanted to end this for a while now but was trying to figure out the right timing", a source told E!
"They are still very much in contact with each other and trying to be there for one another".
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"With any relationship you have a fear that it might not work out".
Another sign of trouble?
The relationship lasted five months after the proposal aired on the Season 21 finale of "The Bachelor" in March. The former couple released a statement saying: "It's with a great amount of heartbreak for the both us as we have chose to end our engagement".
Shortly after Vanessa finished battling 29 other women to win Nick's heart, she moved to Los Angeles, but Nick got super-busy being a contestant on Season 24 of "Dancing with the Stars".
But in the months since that moment, the two never seemed to be any hurry to make the union legal. Does ABC reclaim it since they paid for it?