Can anyone help with the title of this movie It was a lifetime movie made in the late 90s and it was about this teenage boy who was obsessed with this little girls mom?

The movie you're thinking of might be "The Perfect Daughter," which aired in the late 90s. It centers around a teenage boy who becomes infatuated with his friend's mother, leading to troubling consequences. Lifetime movies often explore themes of obsession and complex relationships, making this one fit your description. If that's not the correct title, it could also be "The Girl Who Came Between Them," which has similar themes.