<human>: Can you condense the text into a few key points?

I met my boyfriend on a date app for five months ago. We were dating on the first month and then we started a serious relationship. I really fell in love with him and I think he loves me too. After we iniciated our relationship I moved in to his town to be closer to him, we do not live together in same house but met 3 to 4 times a week. However his  ex girlfriend his too much present in his life.  His ex girlfriend broke up with him  one year ago cause she wanna be single to meet other guys, but she and my bf are still friends cause she belong to the same group of friends of my bf and sometimes they hang out together. Their workplace is really close and sometimes they have lunch together. This hurts me a lot cause I dont  know if he  still loves her I asked him once and he said no that he doesnt love her anymore but his actions like meet her, have a lunch with her, speak with her on facebook said the opposite to me. And I think that she still has an interest on him cause now that she found out that he is on a relationship she calls him more often. I think she doesnt want to go back to him cause she is waiting if a better or suitable man for her appear but at same time she doesn´t want him do be on a relationship cause if she didn´t find that guy she has my bf there for her. To make these situation worse she's overly rich owns a cosmetics company and I dont have financial independence yet,  I'm still studying and only end up my college course in about three years from now I rely on my parents to pay my bills. How should I handle this situation?
I dont want to make an ultimatum to my boyfriend  like saying "or her or me" because I think that is childish. Help me :(
<bot>: I met my boyfriend for 5 months on a date app and his ex-girlfriend is still in touch with him and they sometimes hang-out. I don´t know how to deal with this situation...