Struggling with my mental health

I’m really struggling with my mental health lately, and find myself planning ways of distancing myself from everyone. Luckily I’m still able to shake my head and say “no that’s not what you want” but an hour later I’ll be thinking about it again. It’s normally about my partner, I think that’s because I live with him so he’s the closest to me. I’ll have day dreams about just texting him when he’s at work, and leaving the house empty for when he returns and I’m really struggling with it because I love him so dearly. I look for any excuse to just pack up and leave everyone behind. My partner will follow a female on tiktok and in sat there considering if that’s an ok reason, or my dad will wind me up one day and I’m like hm let’s just run away. Help me please 😭