I was laying on my couch, I was half asleep, I felt my coworker whom I have a crush on, talk to me. I felt a warmth from hearing her voice and heartache when I woke up and she vanished.
This dream can represent your emotional desire for your coworker. Your attraction towards her may have been strong enough to manifest into your subconscious thought. The warmth you felt from hearing her voice could be related to your desire to connect with her on a deeper level. However, the heartache you felt when you woke up and she vanished could suggest that you are afraid of acting on your feelings, and the fear of rejection might be stopping you from making a move in real life. Alternatively, this dream may only express your desire to have more meaningful connections with people in general, and not just with your coworker.