So, long story short I'm 20, and still virgin, never even got a kiss. Circa 3 years ago i met a girl, we were nothing more than friends but she started Leading me on with sexy banter, which she later told me she did with every Guy she knew. At the time I didnt pick up on it, maybe I should have, but fast forward a year and I start to legitimately love her, except when she rejected me I snapped and got needy, clingy and cringy as hell end even creeped her out. I can realise that and it's been nearly 1.5 years but I'm not even over her yet, feelings haven't changed even though i got told that 'if you fucked her once you wouldn't even think about her anymore' which may or may not be true .

So here I am, with little to no confidence after this experience, and no experience at all with women in general, but I want to change something about that, just don't know where to start