What am I to this person?

I was I intimate with this man for over four years during the four years I always asked if he had a girlfriend he always told me no we worked together and I found out later that the whole four years he was dating another woman during this process we would hang out at work he would give me forehead kisses hold my hand and everything that a boyfriend would do at work so what does that make me and could he possibly love the girlfriend if he was messing with me the whole time. Before he changes jobs he was intimate with me again before he left.
I asked him if he loved her he replied to me not the way that she wants?
What am I to this person?
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