How to know when yur relationship is over?

me n my bf have been together for 2 years .we've been through everything.. pregnancy but i decided not to keep it .. him talking to other girls throughout our first yr together but we've been gud for the past few months n all of the sudden i dont feel the same for him i like other boys and i dont enjoy anymore..i still love him but recently he went away for a week n he thought i was messin around n i wasnt .so he calls me all types of bitches ..so far i broke up with him and i jus dont know if we should continue this relationship ..it would kill me to see him w/another girl