I'm 23, from past 3 months m unable to erect strongly and cannot even control my ejaculation, what to do?

2 different issues. You're describing two different conditions, erectile dysfunction & premature ejaculation, altho latter might lead to former. Stress is major cause of ED in young men whether school, work, money etc. Being in an unhealthy relationship doesn't help either. Nor does smoking & excess alcohol. Re PE, check out http://www.menshealth.com/search/mh-frontend/mh-prod/premature%20ejaculation for options.