Hi Adrian, good news that you have an appointment coming up and that they appear to be taking the way you feel seriously. Which you deserve!!.
If you think it may help it might be an idea to reflect on some of the difficulties you've been having and write them down ready for the appointment as you really don't want to miss passing anything on.
And although you shouldn't really be diagnosing yourself (you know that anyway, right! ) it is good to be checking into the possibilities here. Knowledge can be power right?!! And can help in understanding and finding better/more coping resources. So good on you for taking that initiative and looking for some answers!! Really!!
And you're right that suicide ideation especially on a regular basis can be dangerous but just by recognizing it and giving it significance you are starting to move in the direction of keeping yourself safe. There are hotlines/crisislines to give support if you feel you may need them at any time. And don't for a minute worry that it would make you seem "crazy", "weak", "hopeless", "attention seeking"..........any of the "common" misconceptions of these, because it won't!!. There should be people on the other end who are trained to support you and who care.
And now you know that suicide ideation isn't an isolated thing/not a "rarity" then at least you can feel a bit easier in talking about it, right? It's something you can start to address better with others, you're not alone!!
Just make sure that you keep on getting people to understand the way you're feeling and offer the support you need to be feeling better. You clearly have it in you to be able to move forward, may be really hard, may take plenty of time, maybe times you just want to give up but you are making big strides in working towards a better future: You have tried to reach out to others socially (you want that!), you've recognized your difficulties, you've shared your feelings and experiences here so honestly and reached out for advice, you've made the commitment of seeing a therapist.
It may be a rocky road to feeling better but don't let that dishearten you.
And of course, we're here for you too!!
Alison