I used to have an insecure attachment/unhealthy obsession with my T, but over time I have adjusted and I think it would be accurate to say I have a secure attachment.
For me that means, obviously I have an attachment so I care about her and enjoy being around her. But I don't spend time wondering about what it would be like if we were friends, I don't look her up online, I don't spend hours thinking about her obsessively. I feel safe when I am with her, and I can trust her. I sometimes think forward to the next appointment and can't wait for it, but that's because I need to talk more things through and I need therapy, not because I desperately miss T.

(Do note though, that I am on a loooong break from my therapist and I really really miss her and miss therapy, so if you see any of my posts in the Dear T thread you may be able to tell my attachment is not so secure at the moment, lol.)