Star Crossed: Worlds Apart by Jolene Poole
Gwyn Farrow's disturbing claims of an alien abduction made her parents commit her to a mental institution. When she was released, she knew that she could only rely on herself. But she doesn't return to her normal life. She begins to spend time with a friendly alien named Kael, and although terrified of his species, she finds it in her heart to care for him.
When his world declares war on hers, she is torn between defending her planet and the alien she has come to love.