I don't know how you got into it either but I do know this: The longer you continue this relationship, the less likely you are to find happiness.
Both human experience and the Bible teach us a very important truth: Bad decisions always lead to bad results. The Bible puts it this way: "Do not be deceived: God cannot be mocked. A man reaps what he sows. The one who sows to please his sinful nature, from that nature will reap destruction" (Galatians 6:7-8). Those are sobering words — but they are true.
Perhaps your life has been marked by bad decisions in the past but that's no reason for you to keep making them! Right now, you may feel lonely and unloved, and perhaps this is why you've gotten into the relationship. But it will never provide the love and emotional security you crave so why keep going down this road? The Bible says, "A prudent man (or woman) sees danger and takes refuge, but the simple keep going and suffer for it" (Proverbs 22:3).
The most important thing I can urge you to do, however, is to turn to Christ and open your heart and life to Him. He loves you, and He wants to forgive your sins and give you the stability and peace you need. Commit your life to Him today, and then ask Him to give you the wisdom and courage to do what is right.