You are allowed to be in a relationship if you suffer from mental illness. You are allowed to be in a relationship if your depression takes a dive. You are allowed to be in a relationship if your anxiety takes a leap. You are allowed to be in a relationship if you have eating disorders, personality disorders — you are allowed to be in a relationship even if you’re not managing your symptoms the best that you can.
If you and your partner are willing to put in the work and communicate about your needs, what is difficult for you, why you may do certain things, and how you both are feeling, then a relationship can be beneficial and you do not have to feel guilty for being in one.