My psychic sense is right now, you have a lot of stuff blocking this from happening. Doubt, fear, anxiety, hopelessness, negative thinking. Right now it could be a while before you meet someone. But, you can change this. I would focus on getting your inner self cleaned up and strengthened. There are methods available on this website. This will change everything for you. So rather than wondering what will happen, you can take matters into your own hands. I say this because I don’t see you doing this right now. Great relationships don’t just magically happen, you have to get involved in making them happen.
I feel that the person you have loved for 15 years has a partner, a wife? Your feelings are mot reciprocated. You are now with someone you don’t love but its better than being alone? The longer you stay with this person the harder it will be to end it.they love you but know that your heart is not with them.