Is it normal i stayed with someone out of pity and fear

I would rather be alone but this person basically did all the work of forming a relationship and I just sat back like okay cool, let's do this because it's the normal thing to do and I have nothing better to do. Fast forwards a few months it became a living hell that I've been trying to escape for 2 years and they are fully aware of that. They used lots of guilt trips and even though I know it's all bullshit it still works on me. I don't know why and I wish I could get it to stop. They are a shitty yet troubled person and even if i did try to ghost them as i have tried multiple times they always find a way back. So I just continue to let it happen because it's less worry for me that they are gonna ruin my life if I leave completely or something. Now I've whittled it down to a friendship that's just barely hanging by a thread but they still try to rebuild the relationship occasionally so I feel like the message hasn't gotten completely through yet though i've been saying it - albeit, atop eggshells - for years.