* Short-lived and/or casual: While it's hard to say if he had "girlfriends" in this sense, he's certainly been romantically involved with a few individuals (like Madelyne Pryor).
* Complex and multi-faceted: Some relationships, like his with Jean Grey, have had multiple iterations over the years.
That being said, the most significant and well-known love interests in Cyclops's life are:
* Jean Grey: His first love, the relationship has been tumultuous, with death, resurrection, and various misunderstandings over the years.
* Madelyne Pryor: A clone of Jean Grey, their relationship was a tragic story of deception and manipulation.
* Emma Frost: A powerful telepath and telekinetic, their relationship started as an alliance and evolved into a passionate love.
So, it's difficult to give a specific number. However, if we consider only the significant, long-term, and emotionally impactful relationships, Cyclops has had at least three major love interests.