Breaking up is more complicated the second time around

Hi, I was dating this girl for 4 years but about 3 months ago I tried breaking up with her. The emphasis on tried, I broke up with her but she took it so badly that to stop her tears I said we could work on the relationship. Its now at a point where I’m getting feelings for someone else and I can’t carry on pretending that I’m working on the relationship with my ex to be. I just can’t try again knowing that she’s going to cry because I still see her as one of my best friends and I really don’t want to hurt her. Advice?

I would love to be able to set her up with someone but an added complication is that she lives about 1 hours drive away and I know nobody over her direction

She’s an introvert and talks to me and work colleagues and that’s about it. Another reason I wanted to remain friends is so she’s not completely alone.

It was an in person relationship..... she moved for work about a year ago. And the new possible relationship is in person and it takes 35 minutes to see her.