1). Because we have discovered that we can live happily ever after solo.
2). We haven’t found that “spark” and are holding out of that same fire we felt before.
3). Even though we may feel “over” a traumatic experience like losing your ex-boyfriend to cheating, there is still hurt there. We have found happiness and it seems so scary to risk ever feeling that hurt again.
So, yes, this is normal. What should you do about it? Keep dating. Because it’s fun! But from here on out don’t let the relationships make it to two months, eliminate them faster to make room for some of that spark.