No reply after first date?

Went on a date yesterday. Girl says she had fun, I also had fun she says text me when you get home I text her about 30 minutes later. No reply since. I think she's not interested, While on the date she kept receiving messages some from the dating website we met on and she kept replying. If someone has their phone in their hands this much while on a date I know they seen my message, but I refuse to chase because that was a turn off for me. Do you think it's safe to say she's not interested?
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