To dream that you see a cockroach means that you are feeling afraid of something.
Dream dictionary: Cockroach dream meanings
The dream, in which you see the cockroach, represents the necessity for cleansing. Perhaps the dream suggests you to start things all over again instead of staying on old ones. The dream could also show the emotional turmoil you are suffering from, therefore you should consider to keep growing and getting rid of the negative thoughts from time to time.
To see roaches in your dream represents an unwanted quality of yourself in which you need to confront. Maybe this quality is created by undesirable situation of your life. Alternatively, it may be a clever remark of your subconscious mind for smoking marijuana. On a positive note, roaches may also represent quality of being able to grip something firmly. Additionally, it also means longevity. Please also see cockroach.