Sports Personality Of The Year...
Film, Media & TV0 min ago
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If you are both/were both in relationships, no matter how rocky, it may just be that he can't easily respond to you if he's with the other person.
If he can be bothered to get in touch the minute you get back from holiday [by the way, were you in touch with him while you were away? Did he try to reach you but you didn't reply? This has to be a two-way street, doesn't it?] then I'd surmise that he is indeed interested.
Play it by ear... if it works out then great, if it doesn't then no harm's been done, has it?