Supporting son with his first break up - ASD

Hi just wondering if anyone has any advice or words of wisdom in regards to supporting my teenage son with his first breakup . 
i worry he no longer has anyone to speak to really, as he was spending a lot of his time on the phone to her , and he has clearly opened up alot to her . I think she may also have traits of ASD. 
the problem is it appears then relationship got very intense quickly , and I fear this will impact on his confidence , trust , and /“self esteem . In the past when he falls out with people he won’t acknowledge them again , and they are then enemies ! I worry he will become rude to her for finishing with him . He’s 13 . 
I know this is a very normal experience really , but with the added needs of ASD with teens , I’m conscious in ways to support him