New bf doesn't last long

Sorry if it's tmi but my new bf and I just started having sex with each other. We're both not new to it but it seems like we're having some issues..

He has trouble getting it in and it hurts me cos I'm very tight. Once he's in it's okay but as soon as he starts moving he has trouble controlling himself. He comes after a few strokes.

I keep telling him it's okay but it's frustrating and embarrassing to him apparently.

Is there anything we can do to help it?