<human>: I have been "in love" a couple of times in my life. I was really into those two girls (years apart). Always felt like could do anything to be with them anytime. Got rejected both times. Wrong place...wrong time, wrong person perhaps. Ever since it happened the first time (8/9 years ago) I have not been too well for a long period of time. Always felt demotivated and a lack of interest in most things. The second time it happened (3/4) years ago, I put an emotional wall around me which eventually cost me my relationship with another girl. From then on I have become very machine-like. I am not motivated at work. My mind vehemently rejects the idea of being with someone. I think it has had enough of mental stress for a lifetime. I feel like I have emptied my heart out a couple of times and did not get anything in return. I am incapable of liking someone else and being in a committed relationship.

Can you condense the text into three sentences or less?
<bot>: Question to redditors who may have had similar experiences, how long does this phase stay for? Sometimes I feel like I will end up alone because I wont be able to truly like someone like I did before. Is this fear rational?