Old therapist contacted me again

This is gonna be long... I'm sorry.

So I used to see a therapist once a week or so and that was going pretty good. I had seen a couple before her and they were okay I guess. Except one left over the summer with nothing more than a letter (I saw these therapists at school and this one{let's call her ms Dewey} never offered to see me over the summer) and I had to have a new one(let's call her ms Carter) the next year and I wasn't sure I was willing to do that cause I'd been switched before and it's really hard to start talking to someone new. Well, Ms Carter was alright and she's the one who recently got back in contact... Thing is she knew about the whole thing with me not wanting to have to switch people again... She even offered to continue seeing me over the summer after my junior year and after I graduated if she could. But things happened and she had to leave part way through my senior year when she said she'd be there all year and well she left, and the previous one, Ms Dewey, came back which was okay ish. I missed Ms Carter though and I only saw Ms Dewey once or twice before she disappeared again and I ended up having another new person who was supposed to be temporary but ended up being the only one I saw for the rest of the year. Let's call him Mr Gray. Mr Gray was alright. Pretty cool.

Anyway, Ms Carter left just barely over a month before the year mark for my dad's death came around and right after my best friend who is like a sister to me moved to New York from my state, Florida... Ms Carter said she'd keep in touch but she didn't and she said she'd stop by my house before she moved to say bye and she didn't... Like it hurt... But I kind of want to start talking to her again... She offered to start seeing me again. She can kind of get how I feel cause she lost her mom just a few days after I lost my dad. Honestly she did a lot to help me... But like I also don't want to have her leave again... Which I know she will... I don't know what to do...

Should i start seeing her again if possible or not? Like I'm starting to go downhill again so I kind of need her... But I don't want to risk having her leave when I need someone the most and at the same time I'm about to move and have to get a job and stuff so I might not be able to anyway. Advice?