Am I wrong?

So I been dating this guy for 4 years and this girl comes up that’s he’s texting talking how they want to be together and then he proposed I said yes like a dummy fast forward two years later he sends the same girl money talking they friends and they don’t talk she just requested the money so he sent it. I told him to let me see the phone or we over am I over reacting bc it’s been two years why is this girl still in the picture on top of him giving his baby mama has money to see his child I’m like he already takes care of the child why do she always needs gas money in order for him to see him I think he’s up to no good and I’m fed up