What does it mean when a guy opens up to you about personally stuff from when he was younger?

There is a guy that I’m good friends with and I have feelings for and I think he might feel the same way. We have been texting each other everyday for the past couple of weeks and he told me he was going out of town so I asked him where he was going. He told me where and why and then got into some really personal stuff that I would not like to share that happened to his mom when he was little. He also started opening up about other family stuff. Does this mean anything? Why is he opening up to me? I really wasn’t expecting him to do this.
What does it mean when a guy opens up to you about personally stuff from when he was younger?
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