Why do libras start ignoring?

So I (F30) had sweet thing going with a libra (M33) - shareing things about eachother, loads of attention to one another, different acctivities we did together. Then we had conversation that lead us to admit our feelings, they were(are) mutal. Before he started with this ignoring’ish state he told me that lets see how things will go or something in the same effect - letting me know that something is changeing. We are still in contact from time to time but only in superficial talk way. And I dont understand why is that? Do i need to do something? Do i need to wait longer or stop this nonsense altogether?