How do I break up with someone if they are suicidal..

I’ve been in a relationship for about 9 months. Recently we’ve been getting into fights more often, most times my fault. they’re really clingy and I’ve kind of lost feelings for them, leading me to be more dry and aggravated. They have a bad home life I know about and not many friends leading to them taking abt depression sh and suicide frequently. I do like them as a friend, I just don’t want to be in a relationship, I really didn’t even want to be in one originally It just felt wrong saying no, which I know is bad.

I do love them as a person they are sweet and share interest with me. I just can’t keep pretending I want them to be more than my friend. I also think it’s worse because often I’ll be rude towards them not necessarily on purpose but just because I don’t have interest. I’ve let the relationship get too far. pretty sure they wouldn’t take it well taking their life since they’ve talked commonly about how they would even with us dating. me having to talk them out of doing it multiple times just makes me feel weird.. Im not good with talking or expressing my emotions which is why i agreed to dating in the first place even though I didn’t want too.

I really just want to be by myself agin, being in a relationship this high maintenance is exhausting. I just really don’t want to see my friend get more depressed or worse in the process..