Ex wanted to be friends now maybe more?

So me and my ex bf broke up in October it was a clean break and we remained friends. For about 6 weeks we had little contact just the occasional text. Recently he has been texting me everyday like he used to when we were together, sending flirty messages and said he was glad I haven't been with anyone else since him. He's invited me round to his house for the weekend... i'm just so confused, yes we are mates but sometimes he acts like we are still together. Really don't know what to think

Just ask him what his intentions are. Seems like he wants to either get back together or just have a casual sexual relationship. What do you want is the real question here? Just have an open/honest conversation with him.

Yep - ask him what's going on.