You cannot ask her out yet, because you're not ready. You haven't done your homework. You dont have enough ammo, you've already lost. You dont have a business plan nor an exit strategy.
Next time think of this situation as a game. A game need to have strategies and skills. The DJ bible provide the strategies and its up to you to develope the knowledge, skills, attidude, wisdom ect.
Suppose you ask her out tomorrow, then she say yes. We may say that you have a "date anticipation". Similarly, you might have a "reject anticipation".
If you knew that tomorrow a coin would be tossed to decide whether you would get a date or a reject, we should say that you had a 1/2 date, 1/2 reject anticipation. Thus an anticpation of an individual is a state and various probabilities of other contingencies.
Now, if you ask her out you will get 50% chance to get a date. Even if you get a reject, you will not lose anything. No risk is involve.
BUT.. .. you have already put your money on the table by saying you like her a lot. And you might be in the "friend zone" (the point of no return). She is now have the upper hand. If you lose, you can lose you self pride -> turns in to low confident .... ect -> to no values. Your risk is now greater than your return.
I suggest you take your money off the table, gamble it without the risk. No matter how it turns out, study the strategies, develope your skills. Go on out and play other games, get involve in "date anticipation" without risk. Eventually you will get a date.