He obviously uses me, but I still love him

When we first started going out , he was so into me, and made it super obvious. He wasn’t afraid to hold me in public or show me off to his friends. He was gentle, and never rushed me into anything. We had amazing dates, and after we had sex for the first time, that’s all he wanted (he was a virgin beforehand) . We never officially labelled ourselves with boyfriend/girlfriend, but tonight I saw him for the first time in TWO MONTHS. We talked for maybe 10-15 minutes before we started hooking up. I gave him a blowjob ... and as soon as he finished he said he had to go home straight away, and barely said goodbye (FYI, there was no emergency or anything, he just wanted to play fucking fortnite). I’m so mad but I’m more hurt, because I know he’s just using me at this point . What should I do? I know I should lose his number , but it’s too hard to do.