Urgent dog rehome

I need to rehome my 15 month old dog she is 3/4 Belgian Malinios 1/4 German Shepard, she is an unfixed female, her name is Ripley. She is an ex boyfriend's dog and he left and didnt take her with him. She is amazing but a total mismatch for me in terms of energy. She does ok with other dogs although she is a little possesive of my attention. She also does okay with cats although only under supervision. She needs a home with room for her to run with people that have time for her and are more familiar with handling these types of dogs. She knows some basic tricks like : sit, down, up, touch, focus, leave it, drop it, paw, other paw and spins, she isn't crate trained and she likes to pull on walks (although she is improving there). Please reach out if interested I'm desperately looking for a good home for her.