NEED TO KNOW

Sources confirmed exclusively to PEOPLE earlier this month that Loughlin and Giannulli recently separated

Now, an insider tells PEOPLE Loughlin feels "betrayed" by her ex

"They're in very different places right now and it's unlikely that they'll find their way back together," says the source

It's likely that Lori Loughlin and Mossimo Giannulli have split for good.

Earlier this month, PEOPLE confirmed that the couple of nearly 28 years had recently separated . The actress' rep Elizabeth Much said in a statement that Loughlin and Giannulli are "living apart and taking a break from their marriage." Much noted, though, that "no legal proceedings" had begun.

A source now tells PEOPLE exclusively that the rocky last few years for the couple "put a strain on their marriag

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