Suggest Treatment For Small And Weak Penis

hello i am a healthy person of normal physical built.I am a very emotional person.i am educated also .i want to share one of my physical problem with you.i have got engaged in a bad habit of masturbation since 16 year of age.because of traditional background and my emotional attitude i remained always unconnected with my parents and never discussed problems.now i feel my penis is small and weak and it also doesn't open at a tip during masturbation like others healthy people.i find it unnormal comparing with others,it causes me mental stress .kindly suggest me remedy for this.i need an expert opinion and thet is why i am sharing it with you.it is also disturbing my future decisions of marriage settlement.