Is he playing me!?!?!?!?!?

Ok so theirs this guy i text a lot and we like each other. But, a few days ago he said he loves me but kinda likes this other girl. I got really mad and we argued. I forgave him, but i still think he still likes her and is playing me? His signature on his phone says (<3 7/2/11 madie <3) and i have the same name as the other girl but i spell it with two d's. So he said it was for me and i said my names with two d's, he said he ran out of room, but he's put longer signatures before. Should I be worried?