Gemini in a dilemma with a Scorpio Part 1

I am a Gemini with Pisces moon rising who met this Scorpio awhile back. We known each other, we first started texting and stuff and we always had plans to meet up but he would usually cancelled because he was working. It was a Friday and we were both off of work and school and agreed to meet up. And god was he fucking hot and older too! And sparks flew, we hit off pretty well. I could tell from the fist time meeting that he was an intense, passionate person. I had never met anyone like him before and it intrigued me; he was a magnet that I couldn't help get drawn in. Of course we had sex, and it was amazing; he was always the dominate and in control. I can be very submissive, but I am not weak at all; I just like it when people take control over me. But whatever. This went on for about a couple of weeks and then he went out of town. While he was gone, I had realized how much I really liked this guy a lot more than I anticipated. He was like nobody that I have ever met. I wanted it to go to the next level and date and hopefully lead into a long-term relationship despite our age difference. And I did, and he agreed. So we were dating.
I saw him a couple of times a week because he was working a lot and within the government programs and stuff; he took me to his apartment, he took me to go eat and we went hiking once. It was the most wonderful experience for me, and I realized how hard I had fallen for this guy.
The first problem started when I saw his FB page and I saw his profile pic was of him and his ex. I didn't make a big deal about and stuff and didn't mention to him about it because I thought it was silly. But one day, he took me to this house he said watching over while his brother was out of town. We ended up having sex in the bedroom but afterwards I realized all this pictures of him and his ex; and then I realized he took me to his ex-boyfriend place. I asked him about but he kept denying it and saying that his ex was a big asshole; so I just let it go. But I kept my guard up. I wanted to give him the benefit of the doubt because there was something about this guy.
Of course being both a Gemini (dual-minded twins) and Pisces (dual-hearted fishes) I was really conflicted and torn about the situation I was. I'm usually really intuitive and physic when it came to knowing people; like being around them long enough I would know alot about them more than they let on. But with him, it was really difficult because he was so private.