my boyfriend is a bad boy

Marissa had to get help from that bad boy but it seems like she is falling for him.... The last day of the project he kissed her and both of them were happy but the next day " hey " marissa said " what do you want" he replied " well I thought you had the same feelings " she asked " I never felt any of that kind of feeling I just wanted to get that project done ." Then he left the places. What happen to make him change him mind and what will happen next ....