When you have experienced rejection from others, it can be hard to trust again. Because we are all human, people (even friends) let us down. This can be very hard to accept because, if you are being a good friend to someone, you don't expect them to let you down, use you, or "drop" you when you are not needed. Even as you develop good friendships which are going well, it is wise to keep these friendships in perspective and to guard your heart from hurt, so if (or when) you are let down in some way, you are still secure. You will still be hurt, but if you depend on God, you can face this and put it into perspective. Our expectations should be realistic and limited.
The sense of rejection and worthlessness that you feel is very significant. It can act to stifle your confidence. This would make communication hard. People may think that you are shy or "a loner". They may also pick up your negative feelings and be threatened by what they sense and, consequently, react against what they perceive as weakness. This is very sad, particularly when we find it in the church, which is where we expect sympathy and warmth. But still, try to find friendship wherever you can. Through experiencing loneliness and then really appreciating the value of friends, you should be sensitised to noticing others around you who are experiencing this need for friendship.
Meanwhile, if you are experiencing loneliness at the moment, turn to God in prayer and to His Word. The Bible can be so encouraging as it reminds us of God's love for us, and that He is with us and for us. Singleness is a big issue for many Christians. It is fine if you are happy being single, but if you are desperate for a companion - as many are - well, it is so hard. Please be wise if you use internet friendship or meeting point sites, Christian or otherwise, as you don't know who you are communicating with. In the case of any meeting, always do so in a group for safety reasons, perhaps at a church function or a public place.
