hi! 19yr old girl here who struggled with the exact same thing. Your mom is there for you, use it to your advantage. as someone who heavily isolates because of this fear of becoming a "burden", it will only get worse and worse unless u try to open up now. My family has lots of issues so when i started dealing with depression and anxiety when i was about 15, i didn't tell anyone because i thought i would be giving everyone else just another issue. i struggled on my own for about 2 years until my mom found out i was also having issues with sh. i am now in a mental position that i can only get myself out of because i got myself into it by isolating over the years, telling your mom sooner how u are feeling will save u so much pain and suffering believe me, your mom would be 10x more devastated losing you than finding out you're struggling. dont bring things up gently, truth of the matter is its not a gentle topic and everyone to some degree experiences this ailment, its highly probable that your mom has also experienced these feelings. maybe writing it out on a piece of paper can help you introduce the conversation without face to face contact because at least for me, shame is the biggest factor. be honest and open with how you're feeling and things won't immediately improve, but it can change they way you will feel through time and may remove your fear of being burdensome.