Your T said some traits about you that he will miss. That's nice to hear.

When my T went on leave, she didn't said anything about missing me or missing something about me. She just said I'll hear from my new (replacement?) T when she will be back at work and how we will go furthur. She said she would be curious to find out how those months went and how my exams went. And what I made of that; I won't hear from herself, but from my replacement T and she isn't that interested/curious because she can wait months to hear how I'm doing.

I'm sure my T doesn't miss me. She's nice and a good T (though she has her mistakes), but she can keep work perfectly good seperated from her personal life. That what I see from how she acts, what she has said and such.
I know T's probably won't be able to work long if they take their work home, but to me it seems so... cold.
Does she like me? I don't think she hates me, but like? She has never said it straight-forward, even not when at the times I told her I worried about that.

I do think their are T's who will miss their clients or some of their clients, especially if they have been seeing that client for a very long time. I don't think all T's will be that open about it.
You can't always be sure if T will miss you or liked you.