Why do people have trouble committing to relationships?

There are a few reasons for why both women and especially men find it hard to commit.
A first common reason is the thought of, "what else is there out there for me? " I'd like to believe that most people are honest and do not have ill intention when they enter a relationship, most people. But when they start to fail on commitment and start cheating, they're usually dissatisfy with their current relationship or have found something someone else that's more suitable. It is our human nature to find what is best for us, or what suites us best in this case. So to commit yourself to a relationship, it means that we will ignore everything else that's out there, even things that may be even better for us. Sealing the deal like this is almost like a lost of freedom for men, if you think about it in an evolutionary perspective.

And yes, I think commitment takes a lot out of us. We are essentially putting our heart out. No body want to place their heart in the wrong hands. So it takes time and A LOT of trust for people to commit, thus making commitment even more difficult.

Lastly, I don't think a relationship has to get boring after people commit. When two couples are in a serious relationship and are honestly committed to one another, they have the potential to build and experience the best if not one of the most intimate and meaningful relationship they will ever have.
When it comes to commitment, it all boils down two factors: trust and compatibility. These two factors are difficult to achieve, but nonetheless they are what makes our most treasured relationship, well, treasured.

Back in th days when I was just trying to get laid, I would say I didn't want to commit simply because if I told the girl that I just wanted to get laid, my chances of getting some were 0; however, if I dated the girl, then I could get laid, but to prevent the girl from thinking that I was serious dating material, I always made the comment that committing to a relationship for me was difficult, and every time the girl then decided that I wasn't a good candidate for her long term dating plans. Many guys I know use the same technique, cause that's how I picked it up, and it does work wonders. OH yea, if you hear guys saying that they are not ready for a relationship, and that they just want to date---again, same thing; they just want to get laid. :)

I think it's both, afraid to commit, and fun not too.

There is a lot of allure in the chase, and in going after that first kiss (really, can anyone ever put it better than Chris Rock? ). I think a lot of people are reluctant to give that up.

At the same time, I think that people see something in their partner that they don't want to live with for the rest of their life, but rather than leave them to find what they do want, they stay because it's easier. So possibly not so much of being afraid to commit, but being afraid to commit to the person that they are with.

I would also say it's different for each person, but I suspect that these both play a part with a lot of people.

I know what you mean I am in a committed relationship as well, and it seems more like the reality of being with only one person, isn't really a reality. As in if you think, "well ya I can flirt it does no harm" but really if your boyfriend knew he would be mad. No harm no foul. I don't see it hard to commit I just see it as a what if situation I mean your future is not written in stone. But at the same time I don't think I could actually act on impulse and DO anything bad. But, then again commitment is hard to decide, if you can absolutely positively trust this person, then no commitment should not be hard.

I get why people don't want a committed relationship yes now in are world today it just seems like everyone cheats maybe I am just seeing the wrong guy he broken my heart and have cheated I have stayed around we are trying to work things out. I am trying to see if I can trust him again. My heart have been stepped on and now I really no what a broken heart is and I don't ever want to feel it again.