Okay, I just read one of your other posts. Sounds like you're just studying right now. It also sounds like you're studying just because your girlfriend is a JW. Am I correct?
If I am correct, you have 2 things working against you at this moment.
1) You're still worldly. You're not a JW because you're not baptized. It just so happens that I have my handy-dandy WT CD in the drive. Here's something from the incredibly stupid Family Happiness book, page 31:
CHRISTLIKE
HEADSHIP 11
The Bible tells us that the man was created with attributes that would make him a successful family head. As such, the man would be responsible before Jehovah for the spiritual and physical well-being of his wife and children. He would have to make balanced decisions that reflect Jehovah’s will and be a good example of godly conduct. "Let wives be in subjection to their husbands as to the Lord, because a husband is head of his wife as the Christ also is head of the congregation." (Ephesians 5:22, 23)
You need to be a strong spiritual head. Now, you can't be spiritually strong unless you're Baptized, attending all the meetings, and going out on Field Service.
I took the following from the other stupid book "Young People Ask- Answers that don't Work" page 258:
Many young Witnesses of Jehovah become full-time evangelizers after finishing school and desire to continue serving in that way after marriage. Now is the time for the two of you to make sure your spiritual goals are compatible.
So, this is what her mother is looking for in her daughter's future husband. You don't fit that description.
2) Again, the pre-marital sex scare. Here's another quote from that YPA book page 226-228
But therein lies a big problem with teenage dating: Teenagers are just beginning to learn how to control these sexual feelings. True, you may well know God’s laws regarding sex and you may sincerely desire to remain chaste. (See Chapter 23.) Even so, a biological fact of life comes into play: The more you keep company with a member of the opposite sex, the more sexual desire can grow—whether you want it to or not. (See pages 232-3.) It is the way all of us are made! Until you are older and more in control of your feelings, dating may simply be too much for you to handle. Unfortunately, many youths find this out the hard way.
So, you have the problem of your manly desires. Therefore, you're f***ed until you get baptized, go door to door, attend all the meetings, and get married. Her mother knows about your manly desires and your spirituality, and she's protecting her daughter from you.