Hi LovingHelper and welcome to IHD!!! I hope we can help you in your quest to help your ex in his journey.
Regarding "getting right onto" transplant. I am sure he has his team running through all the options for him. The thing to keep in mind is that he's so new (relatively) to this world - sounds like from what you said he had little warning of his kidney disease and pretty much went straight to dialysis?? That means a hell of a shock to the system physically and emotionally and so much information to take in regarding his condition, caring for himself, dealing with dialysis and so on.
I'm thinking that he wll be aware of transplant, and may even soon go through evaluation. You don't say how old he is or anything like that which may or may not have any bearing on that process and what tests he may require.
It's definitely a good idea to mention it as a treatment option and that he should discuss it with his team if he hasn't already, but I wouldn't try and push anything on him right now as he's trying to come to grips with everything he has to. Of course you know him better than most so you can have an idea as to what he can take and what he can't. Use your discretion.
I don't want to throw a negative wrench in here but I do want to raise a thought that came to mind when I first read your post - and meant in the nicest possible way - you mention he's your ex. Now we all know that could mean anything (in terms of what happened, how the friendship between you now is)... I guess I'm just thinking that you *may* need to be careful that he doesn't get the wrong idea from your concern, willingness to donate, wanting to help etc. Right now, emtoionally, he is probably very vulnerable and may misconstrue your motives. Again you know him very well so my thought may be totally off base (and if so, I apologise) but it may be something to consider.
Re your donating and your moderately high BP... yes it is likely you may not be deemed a suitable candidate because of that (my own sister was denied on these grounds) - and it's good that you recognise this... but I can tell you from the perspective of someone who had been wanting/needing a donor - that it is the act itself to get tested and want to donate that means so very much. If you can't, then you can't and that's no fault of yours. The serious and considered thought is a beautiful and wonderful thing and I am sure whatever happens with that that he will appreciate more than you know what you would be willing to do for him.
Anyway again welcome to IHD. Hopefully others can help answer this and any other questions you may have!
RichardMEL, Moderator