In love

My first year in college is finally closing in, my boyfriend has it a lot harder being an engineer. We are young, in love, happy, have our ups & downs, and living our life to the fullest. We always talk about our future, getting married, getting cute little puppies, etc. Growing up I have always been scared of dogs and basically all animals. It wasn't until my boyfriend told me that he wanted a dog in the future that I knew I had to get over my fear. My best friend has a dog and now every time I go over to her place I play with her dog but I still won't let her dog lick me because I'm still scared. My friends realized that I am getting more comfortable with dogs because of my boyfriend. It may sound weird but I feel like if I am going out of my comfort zone to play with dogs it really shows how much I care about him and how much I love him <3 We've started getting comfortable not having to talk every second of every day, which definitely gives us our alone with or time with our own friends. Although our relationship is strongly based through text messaging and meeting up once a week I never think its enough. Many people find our relationship adorable and loving but when I tell them I only hang out with him once a week its definitely surprising. But it works for us and that's what matters right? 

Cheating

So my boyfriend and I, lets not mention his name, but we dated back in my 3rd year of high school and then he broke up with me a couple months later. We stayed in touch, even though I didn't want to be friends because it hurt too much. But my last year in high school we decided to get back together, except it was very on and off. I ended up breaking up with him within 2 months and then I dated a younger guy for about 11 days. I ended up cheating on the younger guy with my ex-boyfriend because I was still in love with him. But even after everything that happened we still didn't get back together. I ended up breaking it off with the younger guy and we didn't remain friends. Then later I ended up dating a friend I knew for nearly 9 years, and once again I cheated, and again it was with the guy I was in love with. So yea, I admit it, I did cheat on both of these guys but I just couldn't let go of the guy I was in love with....
So now we've been together for about 2 years, and I brought up the topic of cheating, and I asked him, "What's your take on.. Once a cheater always a cheater?" and he replied saying he wouldn't trust that person .. So I was surprised that he would say that because I did cheat in the past. What does this mean though? And when I tried talking about it he decided that he doesn't want to talk about it. I'm definitely going to talk to him about it, because I would never cheat on him ... so many problems.