Struggling with Negative Thoughts and Emotions

I've realized that I'm unintentionally putting my negative thoughts and feeling on my family and friends 😕 I've distanced myself away from them as much as I can. I'm trying to get better but right now, I'm always miserable. I even distanced myself away from my long distance ex boyfriend ( he lives in South Korea. I live in the USA.) We ended on good terms and he's still my best friend. We promised to be there for each other for emotional support, sending gifts for birthday's. We always read self help books together about positive mindset and manifesting. Recently, we've been watching Netflix together for a few months but today he mentioned that I don't text him a lot to watch Netflix or just in general. I told him I miss talking to him but I need to be in a better, peaceful mindset. And he understood, he knows me well. he knows how my mind works, he told me not to overthink lol. I feel like I bring his mood down, or I put to much of my pain on him. he has his own problems too, he's a person too. He's my best friend not my therapist. But it's hard because he can tell if I'm hiding my feelings. He sees ME the real me. He told me that it's "Give and Receive" and it's true. I'm the same way with him. He can't hide his feelings from me either, because I see him. I see HIS pain when other people don't.