Am I overreacting?

We made a strong attraction towards each other.
I had plans with him today, but I argued terribly with my parents again. So I texted him I might not be available for our plans. [b]might not[/b]. I told him reason. He texted me if I wanted to talk about it , which was nice. Then he said if I didn't want to talk about it, to hold tight. Fine. I took a nap , since that's how I cope sometimes with mental problems. I woke up and felt better. I instantly messaged him that I'm available , it wasn't too late and he wasn't busy. I told him we can go. Instead , he told me to come over to him , he's with female friend. I know that girl , and I got nothing against her , except that she's all over him whenever...
The two of us aren't in official relationship I'd say , but we still have a thing , right? And we're heading there.
So i didn't bother going there. I stayed at my place. Without them.

I know it might be rude to tell a friend that you need to go all of a sudden, because of your "crush" , but if he was my crush and if I was in that situation , I'd apologize to my friend and my friend would understand that I need to leave. It felt like he chose her over me , the girl that is all over him , a girl I saw his comments about how she's hot and has big boobs (WTH?), that is "just friend" , and you two are in apartment alone? Whoa. No thanks.


Then after some time later he calls me and asks me random stuff. It felt like he had good time with her , now that she's gone - I'll do.

*sigh*