I like single, introverted, slow and conservative girls. If she doesn't delete it, she won't reply to the message. Do I have another chance?

If she doesn't have someone she likes, how can she sit alone by the hot fire without feeling? You know she is slow-heating, so let's leave everything to time. If you really like her, stick to it and don't give up, but don't lick the dog too much. Fight when you should, and give up when you should.

She won't reply to you now. You should consider that maybe she is introverted, maybe she is busy, or she has someone she likes, and her energy is not here, or your news is too frequent, which makes her feel uncomfortable. If so, try to adjust.

Feelings are never a person's business. If she really ignores you anyway, she can consider giving up, provided that you get a positive answer, she doesn't like you, and you are willing to give up instead of making a decision without thinking clearly.