Is he leading me on or am I overthinking?

I’ve been seeing a guy for a little over a month. We’ve spent a lot of time together and have spent multiple days in a row together. And within this month we talked about being exclusive but wanting to go slow. He made it very clear on multiple occasions how much he liked me and that he could see us going somewhere. When we started talking he was also talking to an old friend back home that was trying to get at him. Now at the time I didn’t know this I just thought she was a friend. But we met and really hit it off and at first he just told me they were friends and I didn’t care cause we only knew each other for a little.
One night we’re getting ready for bed and this “ friend” keeps blowing up his phone. Apparently she was drunk. The first time he answered it was while I was in the bathroom and took it outside. He came back in and was like “gosh she’s crazy and drunk, she’s crying and just can’t get words out straight” so I just said okay not trying to make a big deal but then she keeps blowing up his phone. So he answered again and took it out of the room. Anyway he comes back in the room and starts off with “I know this seems suspicious and I’m sorry, I know you have questions so ask them.” I really didn’t know what to say. Long story short he had still been talking to her in that way but he just didn’t know how to tell her he wasn’t interested in her anymore and met someone else. I told him that if he wanted to be with her then that was fine, but then we’d be done no hard feelings. He said he didn’t want her like that and wanted me. We talked about it for a while and came to an agreement that he would deal with it. Now when we first met he told me he was going home for her birthday and he’d be there for 2 weeks. So he told me that he would talk to her then and deal with it.
So currently he’s back home and has been not as Responsive as usual. I’m ashamed to admit it that I’ve been watching his snap score go up while he’s not responding to me. What should I do?
Is he leading me on or am I overthinking?
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