What it means when he compliments then goes cold the next day

When someone gives you a compliment then vanishes, the coldness tells you what he actually thinks about you. The compliment might have been real in the moment, but the follow-up shows you don't matter enough to maintain basic consistency. He either got nervous after saying something vulnerable, realized he was moving too fast, or was always planning to cycle back to other people. The timing of the cold shoulder matters. If it happens within 24 hours of the compliment, he's testing to see if you'll chase or get anxious. If it stretches to 2-3 days, he's moved on to someone else and will circle back when he's bored. Either way, this is information about his character, not about you.

Don't reply to the coldness at all. Silence is your actual response. If he was testing you, your non-reaction shows you're not easy to rattle. If he was distracted, you're not there waiting for him to come back. The moment he re-engages with you, you have a decision to make. If he sends a casual text after the cold shoulder without acknowledging the gap, keep your reply short and low-investment. One sentence, no questions, no effort. This signals you're not rewarding the inconsistency. If he actually apologizes or owns the weirdness, then you can engage. Most guys won't do this because it requires accountability. That tells you everything.

If this pattern repeats, compliment then coldness over and over, give it one more round max. By the third cycle, you're training him that he can get away with it. Set an internal rule. Two instances of compliment-and-coldness means you stop replying altogether. Don't announce it, don't make it dramatic. Just let him text into nothing. If he's actually interested, he'll notice and change. If he doesn't notice, you have your answer. The hardest part is not texting him to explain why you're backing off. You don't owe him a reason. He already knows what he did.