<human>: Summarize the given text in a few sentences.

My friend has been in a relationship for over two years with her boyfriend. I really like said boyfriend and they seemed happy with each other.

Last week she told me that her boyfriend is overly negative and "weighing her down" all the time. She said that she couldn't talk about any achievements of hers (like work and sport achievements) with him because he would tear himself up for "not being good enough". She told me stories of her hiding in the back room of her work, crying because of stuff this guy said to her (he (boyfriend) apparently said that they should break up, but I feel like something else may happened too, not sure). 

She says that she's reluctant about breaking up with him because "the good times are really good". 

I spent the weekend with her and she kept on texting her boyfriend. She was trying to hide the fact, but sometimes I would look over my friend's shoulder and see him texting her. 
He would say some pretty depressing stuff to her along the lines of "I'm not good enough to do..." or "Your so lucky because you can do..." or "Why should I take advice from you". She would always be calming him down from something. 

I feel really bad for my friend. I want to help her out but I'm afraid of getting to far into their relationship. I feel like the stuff is none of my business but I hate to see her getting weighed down like this. 

What should I do?
<bot>: Friend has a partner that is "weighing her down". I want to help her, but don't want to get too far into her relationship. What should I do?