Her Quiet Bodyguard by Laura Ann

She’s hoping a fake boyfriend will deter her ex.
But instead he’s proving dangerous to her heart.
Roman grew up learning to be quiet and stay under the radar of his abusive father. Determined to be the exact opposite of his father, he joined the army straight out of high school, only to leave it when his military brothers retired and created a personal security business. Being a bodyguard/fake boyfriend had never been in Roman’s plans, but any chance to be close to the beautiful Rose Logan is proving too hard to resist.
Rose never thought she’d need a personal security expert at her beck and call, but when her ex refuses to back down, she finds herself face to face with a man who steals her breath. Roman is big enough to be intimidating, but gentle enough to melt her heart. She finds the combination intoxicating, and begins to fall for the gentle giant.
Soon the lines between reality and pretend become blurred and Roman struggles to know how to handle the situation. However, before he can figure it out, he has to discover why Rose’s ex-boyfriend went from suave to dangerous and how to get rid of him for good.