She likes a religiously committed man, and there is correspondence between them, such as congratulations (for Ramadaan) and religious reminders. What should she do?

I am a young woman who graduated from university four years ago. Praise be to Allah, I wear hijab and memorise Qur’an, and I love Islam a great deal. I want to know all the details of my religion. I grew up in a conservative family, and during all stages of my life I did not mix with boys, even at work, and I never put any boy’s number in my mobile phone. I always pray to Allah to bless me with a righteous husband who will help me to learn Islam and Qur’an, and help me to be religiously committed. I have refused all the young man who proposed to me, because they were not as religiously committed as I hoped for.
My problem started when I opened an engineering office, and I began to work in it in order to help my family. I got to know a young man who started coming to my office for some of his work. He is studying for his Masters degree in ‘ilm al-hadeeth (hadeeth sciences), and he is top of the class in his specialised studies. I asked him if I could ask him about some matters having to do with Islam, and he asked me for my phone number so that he could tell me the answers. I gave him my number because I trusted myself and him, because he is a man who has knowledge of sharee‘ah, and it is obvious that I am impressed with his Islamic character, because in our society you rarely see a young man who follows the example of the Prophet (blessings and peace of Allah be upon him) and lets his beard grow. After that he contacted me and gave me the answer, and he said: You can get in touch any time you need something. After that, I sent him a text message to thank him and congratulate him on the occasion of the month of Ramadan, and he replied to my message. After that, he began to send me messages from time to time that contain advice, du‘aa’s or hadeeth of the Messenger (blessings and peace of Allah be upon him), and I began to reply in like manner. But I was always very happy to receive his messages, and they made me feel that he remembers me and was thinking of me, and I prayed to Allah to make him my husband, and I said to myself that maybe he will graduate and propose to me.
I do not know why I am so fond of him. Every time a young man proposes to me, I reject him and compare him to this man, especially with regard to religious commitment. But sometimes I think that exchanging messages with him is haraam, so I would stop doing that, but he was sending me a message every week, and I used to reply and I thought that if it was haraam, and he is one of the people of knowledge, then how can he approve of that? I do not know if he is married or not, but I think that if he was married, he would not send messages to me; I know the society in which I live.
Now I do not know what I should do, or how I can find out whether he is married or not, or if he wants to marry me or not, or if corresponding with him is haraam. Should I wait for him? I do not have anyone trustworthy who could help me. I know that in material terms he is not well off, but I used to wonder if this is the reason, because I have a share of beauty that makes many people propose marriage to me. Please advise me.