I’m so uncomfortable with my fiancé’s past and I can’t shake the feeling?

Angels12345
Me and my now boyfriend met on a dating site. The very next day I went over to his and slept with him. I was in a long distance relationship at the time and told my now boyfriend this a week after meeting him. He said he hoped I sort of my head but he continued wanting to see me. He was always really sweet, calling me everyday even telling me he loved me. He told me I was the only girl he was speaking with. I believed him. Fast forward two years and I found out he was still sleeping around. I asked him why? And he said because I wasn’t giving him my full attention. I wasn’t showing deep interest in him and he knew I was still hung up on my ex. He told me he always really liked me at the time, so I questioned him, how could he sleep with those other women if he really liked me? Well i told him, if you really liked me, you wouldn’t be able to sleep with other women. He said yeah but I liked them too- I was like what, in what way? He said in a sexual way he liked them, to have sex with them. He said with me he wanted more but I wasn’t giving him the signal I was really interested in him. Fast forward two years he is the most loyal guy I know. I’ve not catched him talking to any other girls and what not but it just makes me think what the hell was I too him all that time? I know I was wrong for still meeting the guy in Germany, but when he said he liked those girls for sex it really made me feel sick. As I was giving that to him and had feelings for him but just couldn’t officially end my relationship with my long distance partner at the time. He tells me to stop thinking about the past. But what can I do? :( is this a normal thing for men to do? Did he actually have any real feelings for me at the time? I mean he was saying all the right words, but he was still sleeping with other women! (He said just for sex)
I’m so uncomfortable with my fiancé’s past and I can’t shake the feeling?
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