<human>: Long story short me [m19] and her [f18] have been dating 4 years, the last of which I have been at college. She has struggled the whole time with jelousy and over protectiveness and after giving her hundreds of chances nothing has changed.
 It's finally beginning to make me regret our relationship and become unhappy with my day to day life, as well as missing out in many opportunities she 'doesnt want me to do'. 
Everytime I work out that I want to end it though I cant , I freeze , I put it off and say 'I'll do it next time it happens' or ' one last try' I've been doing this for a year now and figure thats probably not healthy, however she is still madly in love. What the hell can I do ? 
I cant randomly end a four year relationship with someone madly in love with me, but then again I dont want to sit around wasting my life away as a 19 year old.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: 19M , feel like im simply putting off ending a four year relationship rather than enjoying it. Anyone ever been in a similar situation ?