Breakup advice

Maddie
Going through terrible heartbreak. The man I have loved for more than a year, my best friend, has made the decision to take time for himself. He suffers from anxiety and mild depression. He can't give me the love and attention I deserve. I know it's for the best and it's not written off for the future, but I can't help feeling so devastated. Anyone have any tips? I'm so scared I'll lose him forever. We made so many plans for the future. I feel so betrayed..like he lied about everything. And I feel pathetic for wanting nothing more than to beg for him to come back. I can't and I won't but how do I deal?