<human>: Can you succinctly summarize the text in 1-3 sentences?

Our relationship was not a normal one, I met him while he was in my city for New Year, he went back to London and we talked everyday since. Now I live with him with flatmates and I thought it was all going really good, fair enough we had bickers but all couples do right?

I found Facebook messages between him and his ex girlfriend from back home, more precisely she misses him and he misses her too. The worst messages was on Valentines Day, when he sent me a cute wee facebook message, but sent her the exact same one. Seeing these posts was like a slap in the face.

When I confronted him about this, he said she meant nothing and I was the one he loved, and he wants me to go back to New Zealand with him when his visa runs out so we can make a life there.
<bot>: What do I do in this situation? Do I chuck him and head back home or trust that there is nothing going on?