Complex sentence: He tells Lola what he did, breaking up with her in the process, and leaving her devastated; he later visits Lauren and tells her that he is still in love with her and is happy to wait until things with Dean fail.
Split into simpler sentences: He tells Lola what he did, breaking up with her in the process. He then tells Lauren that he is still in love with her and is happy to wait until things with Dean fail.