It means you’re his booty call. Or booty text. Possibly his booty IM or booty Skype if he doesn’t feel like using his minutes. If he won’t take you out on a proper date, or even invite you to his place, that means he’s just looking to hook up in the laziest way possible.
Test him. The next time he calls, ask him to meet you for dinner or drinks. If he claims he has some work thing and will stop by your place later, you’ll know he’s only, as the great scholar Fred Durst once said, “in it for the nookie.”
If you’re cool with just being friends with benefits, great. If not, you might want to pull the plug on this one. Tell him that you want to hang out outside of your apartment. Ask if he’s interested in dating you, as opposed to just coming over whenever to watch DVDs and fool around. If he is interested in dating, it will be time to scale things way back. I’m talking like 1950s-style dating. Not even a kiss on the first date. Get him to put in the hard work and effort that he so far has successfully avoided. In the end, this will make him want you more and also force him to treat you with more respect.
If you really like him, tell him he needs to take you out on actual dates or, at the very least, be seen with you in public. Otherwise, I would say dump him. So far he doesn’t seem to have much interest in you outside of a casual hook up buddy.
Also, if he NEVER brings you to his place, that should arise suspicion that perhaps yours isn’t the only apartment he’s visiting.