Is this considered insensitive?

[Mischa Smythe]

Well. This guy i met from my sports club. He added me on facebook and we talked a bit online. I confessed there that i had a crush on him, and he seemed keen and said he wanted to go on a date.

So we met up for coffee. Couple of days later i went to his house. We chatted. He kissed me on the lips twice, and also kissed me on both cheeks.

He would often flirt with me on facebook. I was unable to see him for a couple of weeks, as we both had commitments.

Then i see his relationship status change on facebook to in a relationship with this other girl. He then sent me a msg saying he met a girl on the weekend and things had progressed fast. I immediately removed him from facebook and sent him a txt saying i didn't want to see him again. He said he thought we were good friends.

Was this really insensitive of him to do this or am i overreactng. I personally think it is a low act but wanted to know other opinions.