What do you guys think he meant by that? I’m not mad just confused?

So I dated a man for almost two years. Long story short he met this woman in Florida while we were on vacation because me and him got into it badly. After leaving he stayed in contact but me and him tried to work on things sleeping together and things but he made it clear he wouldn’t just block her just in case we don’t work. We live with each other bumped head the last couple days. So he booked a flight for a day and went to have a date with her but texted me he was sorry and that he loved me but he has to finish what he started.
What do you guys think he meant by that? I’m not mad just confused?
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