False Sexual Haressmant

Few of my college mates are framing me in sexual harassment. They didn't like me so they are doing this. There are several incidents in which they framed me. Almost 2 years ago a mob of my college mates made to seat me behind her and made a girl to complain to staff. But they didn't even warn me. I didn't texted her through mobile too till the date. I never stalked her. During March 2016 it was last month of my college days we had some free hours so watching movie the mob made her sit behind me and claim that I shown her sexually intimidating scene. Yesterday I went to college to get certificate. Totally I spent 3 Hours in college from 11:00 - 1:40. During which I searched for staff to get certificate for my job. She and 3 others were also there. I avoided her. Staff was absent. In case I didn't get certificate, company advised me to get attested internet mark sheet copy. So I went library to use internet. Before that one of those 3 asked me and he knew I went to use internet so he made her to go library. When I entered library she said HI with hands up and I did the same. After that incident I didn't see her. Then I went out of college to get printout as college has introduced password system to use internet. for almost 45 minutes I was out of my college and came back to get attestation. During which one of those 4 member got my phone and dialed her number repeatedly for 16 times. Luckily due to some network problem no call got connected. Then I returned home. But those 3 can falsely say that I proposed her/ stalked her and she can use them as evidence and the college staffs hate me as few students only tell bad about me and all of them hate me because of my caste. I have my joining on 8 December. I think they are aiming at black listing me from NSR of NASSCOM. In last 6 months I saw her only once i.e., yesterday. Now What should I do? what are all other evidences they can use against me? Thank You