A teen with a grimoire conjures demons. As you can imagine there is a girl he likes and bullies who chase women and make his life difficult. Conjuring gets out of control and he eventually comes face to face with a demon in hell (bad stop motion). In the end, the kid ditches the book and the bullies pick it up: “Who needs girls when we have demons.” I remember that last quote.
“TheGate II: Trespassers”(1990)?
Here is part of the plot synopsis from Wikipedia, describing the ending you remembered, maybe?
“After the funeral service for Terrence ends, he emerges from the coffin and Liz and Terrence kiss. After they leave, John and Moe also emerge from the coffin. Seeing Liz and Terry together, they state, “Who needs girls?, when you got demons!”