Boyfriend wants to travel, many stumbles

My boyfriend of almost a year, has mentioned traveling for long periods of time to make large amounts of money, and only coming back for short periods of time like 1-10 days. He's found a job that will be 40 days gone and 10 day vacation. He's gave my hopes up when he'd say that he would stay and take a job here, or that he wouldn't take the job permanatly only long enough to make the money he needs to make. This makes me feel like I have no worth to him, and only money does. *We've had a problem with this girl, that he started talking to not too long ago, he met her at a rock festival, and he's been wantin gto meet new peopel with similar interests. She got on his shoulders to see the stage, and they talked the whole time and hung out, at the end they got eachothers number, email, aim, myspace, etc. and now they talk constantly. And he doesn't care how I felt about it. I was completly overwhelmed.

I dont know if I'm overreacting about him leaving me, but I have a lot to deal with, im going to be a student full time, in less then a week and I have to yet still get an apartment, job, and car and it's hard when he wants to leave me here lonely. I want to spend my life with him and he just wants to make money and, he says if I can find a job that can give him 5000$$ after taxes he'll stay which is highyl doubtful.

I dont know what to do anymore... we've had our stumbles, and he's been unloyal, and done some bad things to me. I dont know what to do. We've gotten better, until he said he wants to do this permanatly and now im just overwhelmed.

I dotn know if I can handle it. And he says im not being supportive enough. I stayed in NY to be with him, because he said he'd move with me whereever I went. We've tried very hard to keep this relationship going, I've done so much to keep him happy. But it seems money is what makes him smile.

What advice should I take into consideration

I dotn know what to feel, think or do anymore.