Worried about overloading on friend

Hey everyone. I was diagnosed with bipolar 2 in 2022, and I have had an amazing friend walking on this journey with me since the beginning of my diagnosis. In 2023 he talked to me about how it scared him to think that I was his only resource/support for my bipolar disorder and that I needed to widen my support group. I understood and made sure to talk to him that I was reaching out to other people and taking my meds and going to therapy. I have continued to do this and have a really great and big support system now. However, this fall and winter I had the worst mood swing I had since 2022, but I hid it a lot from my family and him honestly because I didn’t want to overload everybody, and I’m pretty sure part of this fear comes from that original discussion. Does anybody have any advice on gaining the confidence to reach out in a healthy way? Or just talking to him about that dynamic? I really love our friendship and I don’t want to harm it.