Search Results: ex boyfriend kissed me

So my boyfriend of 6 months and I, both have anxiety and, the past month, our anxiety has been mutually high which increased our fighting. The other day when he was coming to see me, he said his ex girlfriend of two years popped up in his mind. He says he doesn't know why, he hasn't talked to her in a good 5-6 months, and they've been broken up a year. They were long distance with strict parents, and they'd only ever gone out in person once. She sent him a message after we'd gotten together saying she still loved him but he shrugged it off. He wanted a break because of all our fighting and he needs to know why these feelings came into his mind again. He says he's insanely in love with me, but wants to talk to her to see how he feels. He came over today, despite the break and kissed me, and said he knows he's still in love with me but needs time. I know more about his past than she does. He was kicked out shortly after they broke up, and he's a changed person she doesn't know anymore. Should I even believe we have a chance? I love him very much. Random tidbit of info: we were long distance for 4 of our 6 months.

We went out in several dates for 2 months. We had established exclusivity (we wouldn't date other people) one month in. We kissed a lot from the start and had sex 2-3 times before splitting. I met a few of his relatives (he never met mine, or my friends). We were both emotionally invested in each other.
We never called ourselves boyfriend/girlfriend though, and as I said he didn't meet any of my friends or family. I did like him a lot and I had to break up per se (I had to tell him I didn't want to do our thing anymore).

Is he an ex or not quite?