I'm not happy because I feel like my boyfriend would sleep with his slutty friends if given the chance.  I still stay and trust him, though.
Do you actually trust him? Are you okay?
I'm tired of this and I no longer feel loved or cared for
If you no longer feel like a relationship is working it is ok to end it. You should be in a healthy relationship where you can trust your partner.
I just want to get out of this relationship and move on.
Yes, I agree with you and I think this is for the best.