Tinder, bear with me on this one Advise? and x's at the end of messages?

I will sum this up the best I can.

Me and this girl matched on Tinder. We get talking next day I have her num and we have been chatting A LOT everyday since then. I assume your all a custom to Tinder, you can't talk to each other unless you have both liked each other.

we have both sort of agreed to take things slow, and she says things like I like you and this is going good this being us.

My actual question is does x's at the end of the message mean something to you guys, To me they do, I don't send anyone but this girl x's but reason why I ask this is because we started of with none, jumped to two, now we send a normal of 3 and when we are complementing each other or saying night we send 4, the fact number of x's are growing does that indicate things, I mean we obviously must like each other right? Am I being an idiot for not asking her out?

bear in mind we have only been talking for 5 days, and have agreed to take things slow, could that have been a mistake?
Tinder, bear with me on this one Advise? and x's at the end of messages?
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