Thanks for asking.
Why are you thinking that your relationship is ending? Are there any issues in between you both? Such as misunderstanding, mistrust, lack of communication, frequent quarrels, etc.
Always remember nothing last forever. This might be a though time for you both which will soon pass away. Every problem has a solution, sometimes you just need to consult the expert. In your case an expert would be a psychologist or Psychiatrist. A relationship counselling would help you a lot. If there are any associated problems of stress, depression(which are very common) they too shall be addressed.
There are few problems which need intervention from an expert. They may not resolve on its own, rather may worsen if unattended.
Next Steps
Consult an expert.
Health Tips
Do no other worry there is a solution to your problem.
Regards
Dr Pankaj Borade