Why is he doing this?!?!

So the Taurus guy that I was "dating" decided that it would be best if we "broke up" bc he felt like he holds me back and his friends didn't approve of it (due to the age difference; he's 19, I'm 23). Well a month later, he got a new gf, but would still tell me that he thinks about me and would hint that he would rather be with me. Then there are the times that he makes it seem like he's happy with his gf.

The three of us all work together and now this weekend he completely avoided her and worked along side me as often as he could. He even waited an hour after work to give me a ride a home even though I clearly already had one. On the way home, he kept playing songs about wanting to leave his gf for the other girl and making comments about each one. Then today, he came into work with her and just kept flirting with her right in front of me. I just don't understand this behavior!

He's a pussy.

Doesn't matter what sign he is, it's called IMMATURITY. Give him a good 15 yrs to grow out of it.