Relationship Issues

Dae
Hey my name is Dae I'm 22 and my "boyfriend" is about to be 24 and we been knowing each other for 8 years from high school we live together for almost 3 years and we are going through rough patches he's talking too this 20 year old lil girl that has her own relationship and stays in California we live in Texas and he's putting her before me with everything but he keeps saying they are just friends but he wait till I'm away or go outside too talk to her on the phone they've Skype and text everyday and all day and they both want me too believe they just friends but yet we stay getting into it because of her so right now we're not together because he said we need a break but I feel like he did this for the lil girl I'm just confused don't know what too do should I stay or go he don't seem too care about me nomore he can call and text and video chat with her but can't do that with me he say he love me but he doesn't show it because he can't stop talking too this girl he been knowing for only a week I'm just numb feels like I've done wasted my time and it's like he has a password on his phone and always looking over his shoulder when he try's too unlock it too make sure I'm not looking I'm just tired I love him with everything in me but it don't seem like that good enough HELP ME SOMEONE PLEASE I NEED SOMEONE TO TALK TO AND TELL ME WHAT TOO REALLY DO