Most Helpful Girl
Yes, I believe you should. Any problem that is bound to have an impact on your relationship is better to shared. And I can think of very few mental health issues that don't impact one's interpersonal relationships. And, if it impacts interpersonal relationships, that goes double for intimate relationships.
In the very least, sharing the problem allows your partner to understand you and where you're coming from. If they truly care about you, they will support you through it. Sometimes, just being open and honest about our problems is wonderfully therapeutic.
I think, ultimately, it benefits you more to share it than to keep it to yourself.