Why does my ex boyfriend keep looking at me?

me and my ex boyfriend split up back four months ago because this girl put things into his head and really messed it up im seeing another boy now but I still love my ex he keeps looking at me every time we see each other and I want to get back with him can you help me on givin advise to get back with my ex please

Have you thought of what effect this could have on your boyfriend currently? He may feel upset and angry that your relationship was for nothing. The question is whether you really want to get back with your boyfriend? Do you trust him? Trust is an important part of a relationship. If you really do want to get back with your ex, then let down your boyfriend gently. You can maybe ask your ex to go out sometime and see how it goes from there. Hope all goes well for you, whatever you decide.