If you've been living there, even without rent, you generally would qualify for tenants rights, and he'll have to give you a reasonable time and/or file eviction. Look up local tenancy laws, and start finding a place ASAP. Sucky time to be in the market.

have your Ex talk to his father about giving you more time to find a new place to live, at least 30 days. do you help out with any of the bills, if you do, then you can go to court and use your states landlord/Tennant act to your advantage.

I'm assuming you knew his stance on the kids angle when you first got together with him? Unless he was initially in favour of having kids when you met only to change his mind later on. That said, why should either of you expect each other to abandon your respective ideals or change your opinion for one another? While it sucks, it's actually a good thing that you two split; you weren't compatible and your goals in life did not align. Now you can focus on finding someone who shares your ambitions.

I feel like he wanted to be single and the kids thing is the perfect out and dad is just sticking with his son and helping him get rid of you. Just go as quickly as possible. No sense in making it worse than it already is.

They can't evict you if you have lived there for over 30 days. If in the states he can't evict you till August first. Go online and see if you can file against them. I'd move anything into a room and get a lock. Let the police know you may need a temporary restraining order good luck

His father can't do that. There are laws protecting tenants (which you are) from illegal evictions.

Really should have thought that one out before splitting up with him.