Am I doing the same mistake?

Whenever a guy show me thata he's interested in me I get very happy and excited and I do my best to get to know them and understand them but in the end they either cheat or using me foe other reasons, a guy did show me that he's interested in me but I'm scared he's gonna be the same as the others when I for sure know there is nothing wrong with and I'm happy with who iam but this time I don't know what to do and I don't see if made a mistake before, this guy who iam talking with he used to answer fast and talk about other things but now he just left me unread. Am I overthink? I don't know I just can't see why they always do that, if I show interest back they become more dry and play on my feelings when they did show me interest first. What should I do this time?
Am I doing the same mistake?
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