I Need Some Help?

My long-term girlfriend broke up with me the other day and i hae been really down ever since. Ive tried stuff to get me back to happy but nothing seems to work. Ive tried doing my hobbies and things i like, also ive tried getting new hobes but nothing seems to work. I really loved this girl and wanted to marry her. Then one day out of the blue she broke up with me. Any advice on anything i could do to get happy and uplifted again without meds or counsiling would be appreciated.