Coping with ending my long-term situationship

First of all, I want to start this post by acknowledging all of the strong people who have taken the step to end a situationship, despite their feelings for the other person. I hope to do the same soon enough.

To make a long story short, I (27F) have been in a “serious” situationship for nearly 7 months with a (26M). We had a talk about exclusivity and agreed that we only had feelings for each other, but he was hesitant to fully commit to a relationship for a number of reasons. I stupidly believed I could change his mind over time. Even typing that out makes me feel like a fool, because I know I should be pursuing someone who has no doubts about how much they want to be with me. As someone who has been stuck in several situationships in the past, I am desperately needing some words of comfort to get through ending it. I know it’s the right thing to do, but the heartache is unbearable.

Thank you so much in advance for any words of advice you can offer me.