Is it normal that i grow tired easily?

You could be depressed or maybe you just aren't being engaged?

u could just have low blood pressure or something. sometimes if u don't have a high enough blood pressure u get really tired

Less sex more rest.

Probably lacking vitamin D. That's what my doctor told me.

Maybe you're lacking a vitamin or mineral? If you don't already, try taking a daily multivitamin supplement as a starting point. Preferably one with iron in case you're lacking iron. And make sure you're eating a good diet and eating enough too!