The first thing you need to do is to develop self confidence and it can't be developed just with few words. You need to work on it. Why do you want to talk to others? Concentrate on your studies, participate in lectures fully, own your individuality and behave like an independent person. Believe that you have got skills and prove your eligibility to others through your work. People would be attracted and they will rather approach you.
If you'll talk meaningless to others, they'll take you for granted and will never respect your sentiments. Most of the people goes behind the powerful and you've got this power just you need to explore it. The feeling of power is the only thing that can minimize your feelings of worthlesness and loneliness.