Linda Hogan -- Sorry Charlie, We're Breaking Up

Hulk Hogan's ex-wife is back on the market ... 52-year-old Linda Hogan has officially called things off with her 23-year-old boy toy Charlie Hill ... after realizing marriage just isn't in the cards.

Sources close to the former couple tell TMZ ... Charlie recently moved out of Linda's Florida home after nearly 4 years of Cougar bliss.

We're told the two had a heart-to-heart about the future of their relationship this weekend -- and acknowledged they didn't see themselves ever getting married to each other.

Both Charlie and Linda decided it was best to break up ... so they could move on with their lives ... but we're told there's no anger involved and the split was as amicable as splits can be.