What does it mean when a guy thats been crushing on you, stops blowin u up (after puttin out), but is still down and obviously thrilled atm?

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Not to answer my own question, but maybe he's just being stand offish because I'm not single (?) He used to talk of taking the other guy's place though...
What does it mean when a guy thats been crushing on you, stops blowin u up (after puttin out), but is still down and obviously thrilled atm?
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