<human>: Can you give me the gist of the text in a nutshell?

I'm 23f and my bf is 32 and weve been together for almost 3 years. Things have always been really great between us and he is a really sweet guy. Throughout our relationship we've had an understanding that I have a lot of male friends and he has a lot of female friends. Nothing has ever happened on either side and we both trust each other immensely. He knows all my friends and I know his. 

He recently started hanging with a girl from work and I've never met her and he won't really tell me anything about her other than her first name and that she is really great and they have a lot in common. I told him I was a little uneasy about him hanging with a new girl that he would tell me nothing about and he reassured me nothing was or would happen. 

Today he told me they were going to hangout. No big deal really until he told me he didn't want me texting him while they hung out. I've never told him not to text me when I am hanging out with friends and he has never done this to me before. I'm kind of hurt that he doesn't want me to text and I'm also worried and confused why I can't text while he's with this new girl. Should I be worried reddit? Please give me some advice on how to handle this. I'm hurt and scared I'm losing the love of my life.
<bot>: my boyfriend is hanging out with a new girl I know nothing about an doesn't want me to text while they hang out