Most Helpful Guy
My answer completely depends on the legitimacy of him owing you money. If I were you I'd just get him to pay what you can of the bills he owes this month and then never give him money or borrow from him again
Most Helpful Girl
You both need to come to some sort of compromise about Everything till 'the end of the month,' for the month is still young, or this situation you are In Now, could get real Old real quick.
If he has already 'deducted the taxi,' and it is 'fair and square' where you do Not owe him the monies back for the ride, then so be it. I take it you are both even with this, unless there is still an Unpaid balance, then of course, he needs to pay this for what is still owed on the internet bill, or 'Cut him off', for when you move and separate then, you don't want any added expenses.
In the future, until you both do part ways, try not to borrow any money from him. This will also save you some headaches. And makes sure you Know he will not 'kidnap' your cell phone in the middle of the nite, so No excuses to be '10 minutes late' for anything...till the end of the month.