TLDR; Should I try and revive a LTR I ended, or am I just suffering from post-breakup oneitis

I broke up with a LTR of almost 2 years a few weeks back. Felt relived initially because I the relationship was taxing time-wise. I spent most of my evenings and sometimes days with her. I wanted more time to focus on myself, and the Ex was not happy with me being non-present for more than one day. Had 4 days where I did not see her, which was a massive dread game to her (trying to call, texting me, etc). She got extremely sad which prompted me to break-up out of guilt - I had been contemplating breaking up with her for some time, and the absence was me plain ignoring her. Ex was a 6-7 but perfect in the sense that she did a minimal amount of shittests and was obviously deeply taken by me. Now that I've had a few weeks alone, doubt is starting to make it's presence known. I feel as though what I probably needed was just a break. Have you had a similar experience, or am I just suffering from post-breakup oneitis?