Your eyes will not grow weaker as a result of using your glasses however your prescription may change over time.
Most of us don’t notice the tiny changes in our vision from day to day. The brain is very efficient at adapting to small changes over a length of time, so we don’t notice the effort it may take for us to see well.
When you put on your new glasses, suddenly squinting and struggling to see clearly are not needed, and your vision seems very clear and almost effortless. But when you take them off at the end of the day, the improvement in the vision they give us makes us think our glasses have made our vision seem even worse without them than it was before.