The simple answer is NO he cannot connect to you unless you have a wireless network and then he can only connect to that ( if you have one )with your password, he may be able to see you by him searching for a wifi connection in the area but without your password he cannot connect to you, tell him to go away and buy his own as he just wants to get onto the internet for nothing or on the cheap if you do allow him access to your network it will slow your connection to a slower rate therefore your tv internet connection will suffer, plus if you have a internet allowance from you provider you may exceed this and you will have pay a lot more in connection fees for a lessor service.
Always make sure you have a very good password and don't use names or birthdays as passwords keep them safe, it is possible to hack into any wireless network if you have the correct software so keep changing you passwords every so often, at least every two months keep yourself safe from the outside world.................they are watching you!!!!