Folk I'm playing devil's advocate here - just trying to think a bit differently so bear with me.
My 16 year relationship comprised me being Mrs Organised - the one who got things done, who held it all together. Sometimes I really didn't want to be that person. I wanted XH to be that person and lift the weight of keeping it going from my shoulders. He generally did that so it worked out. It wasn't 50/50 but probably 80/20 with me doing 80% but that 20% meant the world to me.
Maybe, just maybe, he's feeling insecure?? Maybe he's been back home and is thinking of his peaches and cream girl who holds it all together and keeps her kids and her roof over her head and he's worrying that she's going to panic and run having seen where he comes from. The most beautiful, confident people have insecurities by the bucket load - just because ours are from different bucket it doesn't mean they're not important.
Perhaps he wanted a text/message from you? Wanted to know you missed him? It's all very well playing the "men should text first" game but perhaps we play ourselves off court when we become too distant? (I'm not saying you've done that ...) Feck, this is hard but it gives me such food for thought.