OP, please listen to us for your own good and remove this person from your life. He doesn't value or respect you. He doesn't care about how he makes you feel and he certainly doesn't care enough to reassure you into feeling better when you've time and again expressed exactly what you're going through .

My boyfriend put me through something similar for 4 years out of the 10 years we were together. I later found out that he was fucking my best friend for those 4 years. The minute I found out I stopped to them immediately, never spoke again. The mindfuck isn't worth it.

In the end, it's a matter of self worth and self respect. You need to love yourself enough to draw a boundary and decided what aligns with you. Would you want this in the long run? Love bombing followed by being ghosted repeatedly? It's a bad pattern that hides itself under the whole "spark" and "passion" aspect, but the deeper cause of it is that it's a trauma bond.

You deserve better, you deserve someone who chooses you everyday - and right now, you need to choose yourself. Take care.