Get ready for a negative outcome and then you will easier survive the collapse of your relationship. It will not be painless, but at least it will not kill you.
1. The main source of stress comes from your partner
You may deny the fact, but if you feel unhappy in a relationship, it may simply mean that you are in a relationship with a person who does not deserve you. Maybe he has fallen out of love with you. Maybe the reason is in you. Whichever explanation it is, do not stay in a toxic relationship. If your partner brings too much stress and tension into your bond, get prepared to say good-bye to each other. If the situation does not change, then a break-up is inevitable.
2. You cannot see a future with your current partner
Are you really in it for the long haul? Imagine your life in 5 years and try to see who is around you. Is it the same partner or someone different? What if you feel better being single and the only reason that makes you stay in your relationship is a habit? Be realistic and if you know that the person you are with right now is not the one who can make you happy in the future, then stop lying to him and yourself and admit it – some day you will split. We do realize that this sort of experience is unpleasant, but such things happen quite often. There are lots of couples who feel good for a short period of time. Later on they understand that their life together is unbearable or meaningless.