I'm drowning and nobody knows
Why do you think nobody knows?
I'm not sure anyone can see me.
You should tell loved ones if you're feeling overwhelmed. They can help you, but only if they know you're struggling.
No they don't care, they aren't helping me.
We don't know that your loved ones are taking such an uncaring attitude toward you.  It is much more likely that they simply don't recognize how you feel.  If you tell them, and they still don't care, then I can help you find support, but for now, there is nothing to lose by just telling them that you are overwhelmed.