What would u do if u kissed someone one day and the next they told u they have a gf?

well he didn't tell me he had a girlfriend. the coward was absent on monday (this happened on a saturday) and i found out the truth. i felt so shameful and i was furious because i really thought we were going to get back together. Really ask him to choose or tell him that you can't be his second. Think about it, do you want a man , for a bf?