Feeling abandoned

I've mentioned this in other posts, but my T1 who've I've been working with for 3 years is moving out of state at the end of October. I have 2 more sessions with him plus a transfer session with him and the new T the last week. He brings it up every session now to let me know how many sessions we have left. Today I started bawling right at the end of our time because of thinking about transferring. It's so hard for me to open up to new people and to let them in, and I'm feeling abandoned by him leaving me during this time when things are extremely difficult for me. He's been trying to assure me that it'll take time and I'll be fine and he thinks I'll get along with the new T but I'm still worried and anxious. He's been such a great T, and picks up on my subtle facial expressions or fiddling. He says he's going to rip off the bandaid in our transfer session and do the talking about everything I've been dealing with to help me open up. How do I let this new T know what I need and how to read me? Do I just see how she does and what she picks up or do I say I laugh when I'm nervous, I fidget to try not to cry, etc? I'm practically in tears just thinking of it.

I would think a reasonably competent therapist would know about laughing when nervous etc.

I'm sorry t's leaving is coming up... it always sucks if you've worked well together, but it hurts a lot more when it comes in the middle of struggles.
I'm glad t is being helpful with the transition. I hope it works out for you. I've never had a t be so involved in the transition (it's always been because of ending internships or me having to find another t at another agency, or a cross-country move...).
Is there anything you think might help you more? Would you feel more comfortable telling new t how to read you and what is generally helpful? I've gone in to seeing a new t with a list of things I definitely wanted them to know about me, especially if I was in a vulnerable place when starting with them. The t's I've done that with seemed ok with it, and it seemed to help.
Hope this transition goes ok

This is difficult. Hopefully, your current T. has spoken with the new-to-you person and given them information that will help the transition, and the new one will likely give you time to continue to process this change....((((((((((hug)))))))))))....been there

Thank you. My therapist has told me already that he's spoken to her and told her everything that's going on, our goals, etc. I'm not sure exactly what he's said but I think hearing it in person from him to her will be helpful. Maybe he's already given her some tips or will then.

Transitioning is hard and I feel for you here. I so wished my Old T would have talked to my New T to help me transition. She was not totally opposed to the idea but really felt that I should do it on my own. That she needed to learn about me from me. I still sometimes think it would be useful if they could talk but far less these days as we are progressing and I am opening up. It has been hard going from working with someone who could just read me like a book instantly, to someone who I do believe struggles to understand me, but it is starting to become worth the hard work of trusting another and sharing myself.

I really do wish you the very best.

Your current T will likely being doing a turnover with the new discussing your case including his method of connecting with you. He will be leaving case notes which will include recommendations on how best to handle your own case, on how best to communicate with you, on challenges, tips, etc. The new T will review your file to see where the old left things. Yes you will need to rebuild a relationship but please trust that you won't be starting from scratch.

Thank you. I know he's already staffed my case with the new T, and he said that he told her everything. And she'll have access to all his notes and everything which should be helpful for her. I don't know exactly what's in the notes, if he noted how to deal with me or how to approach me. I'm hoping that he'll let her know during our transition session or before then.

He sounds like a good therapist that cares about you. Hopefully you're transitioning is going well.

I know the pain of losing a therapist you get on well with. I guess the best thing is to kindly and softly acknowledge your pain around it and know it is normal and be the best kind friend you can to yourself as you go through it. Of course, how you feel about it, depends on what losses you have had in your life and how healed they are, - if you get that.
I send hugs. It will be difficult but even I know that usually when you lose a therapist, you find something better. Strange but true. so you could perhaps keep that in mind, that something better is coming into your life to fill the gap he leaves. HUGS