I agree with you it is hurtful when someone gives you the impression that they love you, and then act as something else.

People usually gives subtle signs about their intentions, and rarely they speak about it explicitly.

If you have had several negative experiences, it doesn't mean automatically it will happen next time. It is like statistics, if you flip a fair coin 100 times and get a tail, their is a 50% chance that you will get a head in time 101.

Don't get harsh on yourself. If you want a break from people for a while, to re-evaluate your experiences and what you can learn from them for future encounters, it is OK. But eventually get out there and live your live. We humans are anti-fragile by nature.