This news won't exactly lead fans to fist pump.
As for what went wrong, it appears a dramatic episode of Jersey Shore: Family Vacation led JWoww to be very disappointed in her man.
On this week's show, Zach was seen wrapping his arm around Jenni's co-star Angelina Pivarnick in Las Vegas. He was also accused of grabbing her butt.
"After seeing tonight's episode I'm pretty hurt," JWoww wrote on Instagram. "I feel disrespected by someone I called a friend and by someone who stated they loved me. For 5 months I was kept in the dark about this. For 5 months I was naive, probably laughed at and made into a story line that will forever haunt me. My heart hurts on so many levels. One thing I learned from tonight's episode is know your value. Don't ever lower your standards."
While the Naturally Woww businesswoman is keeping a low profile on Instagram, fans can't help but reminded of all the happy memories in their relationship.
Take a look at some of their best moments in our romance rewind gallery below.
Jersey Shore: Family Vacation airs Thursday nights at 8 p.m. on MTV.