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Hey,

This potential relationship just started out, so I think it would be valid to go on another date or two just to be sure, but I wouldn't take it much further than that so he doesn't feel strung along. It's possible you're just nervous about a new relationship, but it's also possible like you said that you just got out of a long term relationship.

If you do decide to break things off you can always let him know that he's a really great guy but you just got of a long term relationship and realized that you're not actually ready to date someone else. If you'd like to remain friends with him you can tell him that as well, but if you do it's up to him if he'd like to go that route or not. Either way, it's not your fault and at least you were honest with him.