You're not meeting the right men for you. A relationship is built upon mutual respect, and what you are describing is not respect. Not all men are like what you describe. On the flip side, there are plenty of women who are difficult to deal with as well.

You should enter a relationship with an open mind, without preconceived ideas of how men are, because everyone is different.

I think young men are not as capable of devotion to a single woman, until they hit a certain level of maturity. Don't give your virginity up until you trust a man completely, this takes months if you are together often. You will most likely know when you are ready.

I don't know how old you are, but in time you will mature as will men you seek.