Guys, Why would my ex-boyfriend text me out of the blue?

We spent 14 years together and broke up about 6 months ago, due to culture differences. Out of the blue yesterday, he texted saying that he just want to say hi and see how I am doing. Well I had some bad news about a friend who pasted way yesterday. So I texted my ex tonight, and told him I just needed to talk to someone and if he minded calling. Of course he called and we spoke for an hour, the conversation went well and we caught up a little about our lives, mainly mine. He was comforting about my lost and he ended the conversation with "It was good talking to you, take care." Now, why after all these months would he just call to see how I am doing? Guys do you think that he is missing me and may want to try things again or was he just checking up on me? What do you think?
Guys, Why would my ex-boyfriend text me out of the blue?
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