How do I work on not letting my pride interfere with my relationship and commitment?

Pride can be a "nasty" bug.  I wish I could tell you that there is this simple solution or formula that you could use to solve this concern.  It is more than that.  Taking a conscious effort to address the "pride".  I wonder if your pride is there because you use it as a defense mechanism because of insecurities.

Having medical issues is not something "anyone" would want to face.  It is a journey to "unknowns" at times.  I would ask that you start with being honest with yourself.  And by taking the time to write this question it gives me a sense of willingness. 

I would recommend that you seek psychotherapy to help address issues and not lay the issues on family and friends.  Of course, our family and friends will be there, but sometimes it might become overwhelming.  It is good to take some of this to a professional where they can help you work through your thought process and provide tools to help you cope and reduce stressors from the health issues.

There is effective communication you can implement and that is using "I" statements and communicating our wants and needs. I believe now is the time to be honest when it comes to someone sharing "our space". 

Communicate to your partner what it is you can do and what you are able to do at the present moment.  Remind yourself that no one is responsible for your emotions - only you are.  You can ask for support but you have to be the one willing to make changes in order for change to occur. 

Are there support groups out there that have the same diagnosis as your medical condition? Sometimes, these groups can be most helpful because it gives us a sense of community and understanding with others.  I am also thinking you feel overwhelmed and isolated because of your medical condition.  Seek out coping skills that can help you reduce the anxiousness i.e. meditation, hot baths, looking at the sunset or sunrises, listening to quiet music.  These are just a few examples that give us time to connect with ourself. 

I heard this saying (I don't know who wrote this but I found it to be insightful)-Try and look at life not happening TO us it is happening before us.  It is up to us how we want to approach it.  And I am not just meaning the choices we make for medical assistance and support.  No, I am talking about how WILL you chose to approach the life before you.  Even simple things we say to ourselves and others can change the direction of our day.