To dream of abstaining can mean you are holding yourself back in life. Are you abstaining out of guilt, or are you practicing self-discipline? You may be missing out when you deserve to be enjoying. If you are abstaining to develop self-discipline, the dream reflects this.
There may be someone in your life that you would like more involvement with. You may feel this relationship is out of your power, but it is more likely that you are making a choice to abstain out of guilt, fear, or the unconscious knowledge that it is not right for you.