How can I make this right?
Thanks for taking the time to share what is going on with you.
Have you told your partner how you feel and how you want everything to be better? Have you both acknowledged that it has been a difficult period of time with external pressures? I think that those sorts of conversations are helpful - as hard as they are to have.
It is great that you feel so much love for your partner and I agree with Tony's thoughts, the next step might be to initiate some counselling with an expert. Is that something you have tried before?
My husband and I saw someone for about six months and we found it really useful. We have also both separately seen a psychologist for other things we both have gone through.
Look forward to hearing from you.