Complex sentence: Kaajjal is misunderstood and she falls in love with Dev. Dev avoids her at every cost, and his friend, Dhruv, who just came back from US, sees Kaajjal and falls in love with her at first sight.
Split into simpler sentences: Kaajjal is misunderstood and she falls in love with Dev. Dev avoids her at every cost. His friend, Dhruv, who just came back from the U.S., sees Kaajjal and falls in love with her at first sight.