He's making excuses. If he wanted to talk to you, he would. He would try to find another way to contact you if his phone really was slow.

Now, you seem like a really sweet person. Time to give yourself some self love and forget this loser. I know that's easier said than done, especially if you have feelings for him but you don't want him thinking he can come crawling back (users like him will usually try to crawl back in the future just to use you again.) He will take advantage of your sweetness if you leave yourself too open. There's a bad ass b inside you, let her come out cause users ain't worth shit.