I got dumped by gf who I love very much. Need some advice.

Me and my gf have been going out for several months. Its been great, there's been some rocky patches with some things she has been dealing with but the good outweighs the bad. A couple weeks ago she tried to end things because she felt like she was a burden on me and I could do better. I let her know I was there for here through everything and she came back shortly the next day. Now shes doing it again, since then she has told me she loves me and I love her. But she says she struggles the times when I have plans and we cant do things together all the time and she needs to end it now but she still loves me. I am struggling because I want her to put apart of everything in my life. I know she deals with some mental issues but I want to be there to help her with that. She thinks shes better off alone than with me. I still love her and she says she still loves me. I know she comes around when her issues pass, but I want to know what to do. Its easy to say move on but in this situation I cannot at this time. Everything was great yesterday which makes me want to think this will pass. Need some advice and words of encouragement.