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Maybe you could say "Hi" on Facebook and ask how things are going with her or whatever--maybe even asking if it's okay for you to keep in touch. But remember she did tell you you'd need to wait a year for any kind of significant relationship.

She might not even reply. If not, then that will tell you what's happening. But at least you would know.

Please don't put your life on hold, hoping things might work out. As was said, get out and meet other people, lead a social life. I would be surprised if she is not out meeting other folks and having a social life, too. She has made you no promises, remember. Okay?