We are separating , but he really dosent want to leave . Any advise please !?

We are having problems , I told him that either we work it out or separate, he rather separate, take a break from each other, taste the waters n see what happen... (bunch of bs to me)... but still want to live in the same house ... I can't handle that. I love him. And on top of all that , I found flirtatious emails between him and a coworker . Now his phone is blocked. An he refuse to unlock it. He said that I should base out relationship on how he treats me, not on what he have on his phone.( again bs)

I told him that he need to b out by April and he finally agreed , But I truly think his clothes wi b out b4 that... I Haven't done it bcus we both have 1 children from a prev relationship living in the house

And I don't have the heart to put his kid out in the street... They do have family that live near by though... Any advise on wether I should wait or not, also should I not b rude to him? I cnt help it... I'm so hurt... Any advise please ??

We have been married for 7 years