advice please....

sooo, my boyfriend of 8 years caught me texting someone. Mind you we’re in our early 20s and have had lots of problems with infidelity’s. I chump it up to us being young and learning how to commit. But now he’s doing the tit for tat shit by loving his ex flings photos on Facebook and other girls. Idk maybe we should just move on but he won’t leave and it’s my home so yeah.....?