Advice needed please

I've been seeing this Italian guy for about 5 weeks now.  We've slept together a couple of times but he wouldn't stay over and made an excuse to go home (needed contact lens cleaner, needed to be back for a plumber coming round early).  Anyway he became distant and he didn't call or text until after 3 days and asked me to meet him on Saturday to which I replied yes.  Saturday came and still no call or text to arrange a meet up.  I didn't hear from him all night.  At about 11 a random girl calls my mobile and asks for my name.  I told her that was me and then she was like Oh it must be the wrong one, I asked her how she got my number and she hung up.  I didn't call back or anything and didn't hear off him either.  Late Sunday he texted me saying do you want to meet up- I told him I already had plans (as I had work to do) and he asked to meet me another day so I met him yesterday.  We had lots of hugs and kisses and he was stroking my hair and things were cool.  He told me that he went to a club with his mates and I was just cool about it and didn't say anything as I didn't want to come across as needy and pathetic.  Didn't mention the random phone call from the girl either.  He didn't ask to come back to mine or anything though.  I don't know what to do about it.  Why does everything have to be so complicated?  Am I just one of his many conquests and now the chase is over and we've had sex he's not that into me anymore?