First of all, nothing exists in perpetuity (for eternity) in our universe. Indeed, everything has a beginning and an end, including the Planet Earth we all human beings live. In other words, birth and death are part of nature and inevitable.
The break up process of the African Continent has already started. Indeed, Africa could break apart (see the map) but definitely not in our own time. Nevertheless, even the broken part and the ocean resulting from the break-up, will still be part of the African Continent and not part of another Continent or a Continent for itself.