What is the main conflict in The Truth About Forever by Sarah Dessen?

The Truth About Forever, by Sarah Dessen, follows teenager Macy Queen through the most pivotal summer of her life. Although she is privately still reeling from the death of her father less than two years earlier, Macy makes an effort to appear fine, even perfect, until she begins a part-time job at a catering company and becomes friends with its diverse group of young employees. As she gradually evolves under their influence, Macy realizes that it's okay to embrace life without fear.