Prayer is good. I have a lady, in a pretty good friendship, I would say. But she says she has somebody; so I have been praying about this, and it came to me that if it is God's will for her to marry him, then it is Your will, LORD; and because I do want what is Your will, I am satisfied if it is Your will that she and he get married.
Should you talk with her and ask her? The Bible does say, "Test all things; hold fast what is good." (1 Thessalonians 5:21) I'd say it is not wrong to test, by asking her; but be ready to be good about whatever answer you get. Is she an honest lady? Do you trust her? If she is someone you would marry, I would think you trust her and appreciate her and admire her and consider her to be a sensible and honest person; so if such a good friend says no, then trust God and her about that.
And if she connects with someone else, pray that God makes it good for them, if He really wants them together, or have things not work to marriage if He knows better. Trust God about it. I love others as myself; so I can pray for God to bless him with her, howsoever You please, LORD, if I love him as myself.
In my case, I now can see that I have been more effected by her charm and attractiveness. But now I am getting more into peace and pleasantness of the Holy Spirit's love with her, and this has me more in unity with all our other Christians in our church, and not just with her. So, I'm getting more by growing and getting corrected in God's love that has me sharing and caring in better and better relationships with different people in our church and with others, too.
So, God bless you to grow more with Jesus Family people, and be ready to get an honest answer and make good of it.