Try a New Hobby
Perhaps you've always wanted to try something in the past - now is the perfect time to give it a go!
Examples of interesting activities you can do: partner dancing classes, Salsa, Swing, Jive, Tango, yoga, Pilates, running, swimming, tennis, fencing, basketball, football, hiking, kayaking, sailing, parachuting, cycling, mountain climbing, ice or roller skating, chess, video games, learning to play piano, guitar, reading a book, science experiments, rc airplanes, and so on...
The benefits of these activities are that not only do they help you shift your focus away from someone your are obsessed with, you'll also get to acquire new skills while having good time enjoying yourself :).
Let's try something NEW