Question for Leo Men

I recently started talking to a Leo man about two months ago. We don't live in the same state so we usually just text and call each other. About a week after we started talking he was saying i was perfect for him and that he really wanted to try dating.

So we've been dating for a little over a month now and I've grown so attached to him. He is EVERYTHING i could ever wish for and more. I love how confident and strong he is. But, i think this is where i made a mistake...

One night i told him i loved him (as a person). He didn't ask me or tell me that he loved me, but me being a Libra, if i feel strongly for someone i tend to let them know. He sort of said something like this, "Are you IN love with me? =)"

I told him that i wanted to take this slow and that it'd be awhile before i could finally say that I'm in love with him. He seemed perfectly okay by it.

Recently, we haven't been texting as much. I usually have to text or call him first. I think fair is fair and that things should be equal, but i just let him have his way.

Today, we were texting and he told me that there was this girl. It was a girl he had been in a physical relationship with. i asked him what and he said o nothing. i text him back and ask what and then an hour later he text me back saying that he became busy and told me that the girl was "on him". I took it literally and flipped out.

After i calmed down i asked him more about it. He said that the girl was texting him and said she missed him, etc. But, he wouldn't tell me what he said. He offered to tell me and i said no and he immediately said "OK!" like he was excited that i didn't want to know.

The rest of the time we were on the phone i was sort of quiet. He kept texting ( i could hear him) and i asked who it was and he said it was the girl. Right now I'm texting him and he'll text me like every 30 minutes.

Is there something going on? Is he cheating or just playing mind games? I honestly love him and don't know how much more i can handle..can someone please help me on this?

I'm not scared to ask him i just want someone to give me a little insight on Leo men and this situation please. It would be greatly appreciated